| 2,4-二硝基苯胺 基本信息 | |||
|---|---|---|---|
| CAS号 | 97-02-9 | 分子式 | C6H5N3O4 |
| 分子量 | 183.12200 | 精确质量 | 183.02800 |
| PSA | N/A | LogP | N/A |
合成路线 共1页 839-93-0
1-(2,4-dinitrophenyl)piperidine
→
~99%
97-02-9
2,4-二硝基苯胺
89-02-1
2,4-二硝基苯磺酸水合物
→
~99%
97-02-9
2,4-二硝基苯胺
77287-34-4
甲亚胺酸
+
6075-97-4
1-(2',4'-dinitrophenyl)-3,4,5-trimethylpyrazole
→
~95%
5519-42-6
3,4,5-三甲基吡唑
+
97-02-9
2,4-二硝基苯胺
100-01-6
4-硝基苯胺
→
~95%
97-02-9
2,4-二硝基苯胺
97-00-7
1-氯-2,4-二硝基苯
→
~95%
97-02-9
2,4-二硝基苯胺
7474-11-5
1-(2,4-dinitrophenyl)-3,5-dimethylpyrazole
+
77287-34-4
甲亚胺酸
→
~94%
67-51-6
3,5-二甲基吡唑
+
97-02-9
2,4-二硝基苯胺
70-34-8
2,4-二硝基氟苯
→
~74%
97-02-9
2,4-二硝基苯胺
99-65-0
1,3-二硝基苯
→
~69%
10199-87-8
2,4-dinitrobenzene-1,3-diamine
+
97-02-9
2,4-二硝基苯胺
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
→
~44%
97-02-9
2,4-二硝基苯胺
99-65-0
1,3-二硝基苯
→
~43%
97-02-9
2,4-二硝基苯胺
1589-62-4
环己酮-2,4-二硝基苯腙
→
~29%
97-02-9
2,4-二硝基苯胺
1945-92-2
2,4-二硝基-N-(2-羟乙基)苯胺
→
~29%
97-02-9
2,4-二硝基苯胺
98555-19-2
98555-19-2
→
~5%
28943-91-1
28943-91-1
+
18771-86-3
5-nitro-1-oxido-2,1,3-benzoxadiazol-1-ium
121-14-2
2,4-二硝基甲苯
→
~2%
13296-87-2
苯酰胺, 2,4-二硝基-
+
5267-27-6
5-methyl-2,4-dinitroaniline
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
88-05-1
2,4,6-三甲基苯胺
→
87399-14-2
1-(2,4,6-trimethylphenyl)pyridin-1-ium-3-carboxamide,chloride
+
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
74497-02-2
1-aminobenzene
→
54027-60-0
1-phenylpyridin-1-ium-3-carboxamide,chloride
+
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
106-49-0
对甲苯胺
→
54027-59-7
1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethanone
+
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
123-30-8
4-氨基苯酚
→
87384-52-9
1-(4-hydroxyphenyl)pyridin-1-ium-3-carboxamide,chloride
+
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
106-47-8
对氯苯胺
→
87384-51-8
3-carbamoyl-1-(4-chlorophenyl)pyridin-1-ium chloride
+
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
85026-59-1
(-)-(amino-cis-4-dihydroxy-trans-2,3-hydroxymethyl)-1 cyclopentane
→
102099-16-1
chlorure de (-)-aminocarbonyl-3-(hydroxymethyl-cis-4-dihydroxy-trans-2,3-cyclopentyl) 1-pyridinium
+
97-02-9
2,4-二硝基苯胺
1176728-09-8
α-(5-amino-2-dodecyloxyphenyl)-N-tert-butylnitrone
+
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
→
1176727-70-0
1176727-70-0
+
97-02-9
2,4-二硝基苯胺
1877-77-6
3-氨基苯甲醇
+
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
→
1176727-76-6
1176727-76-6
+
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
371-40-4
4-氟苯胺
→
87384-50-7
3-carbamoyl-1-(4-fluorophenyl)pyridin-1-ium chloride
+
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
104-94-9
对氨基苯甲醚
→
87384-49-4
1-(4-methoxyphenyl)pyridin-1-ium-3-carboxamide,chloride
+
97-02-9
2,4-二硝基苯胺
137353-85-6
N-tert-butyl-α-(3-aminophenyl)nitrone
+
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
→
1176727-65-3
1176727-65-3
+
97-02-9
2,4-二硝基苯胺
99-65-0
1,3-二硝基苯
+
109-73-9
正丁胺
→
13059-86-4
N-butyl-2,4-dinitro-aniline
+
97-02-9
2,4-二硝基苯胺
99-65-0
1,3-二硝基苯
+
111-26-2
正己胺
→
52790-65-5
N-(2,4-dinitrophenyl)hexylamine
+
97-02-9
2,4-二硝基苯胺
51348-06-2
N-hydroxy-2,4-dinitro-Benzenamine
→
18771-86-3
5-nitro-1-oxido-2,1,3-benzoxadiazol-1-ium
+
97-02-9
2,4-二硝基苯胺
903572-34-9
903572-34-9
+
74497-02-2
1-aminobenzene
→
934802-64-9
934802-64-9
+
97-02-9
2,4-二硝基苯胺
51226-12-1
[3-(5,5-二甲基-1,3-二噁-2-基)苯基]胺
+
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
→
1176727-87-9
1176727-87-9
+
97-02-9
2,4-二硝基苯胺
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
+
103-49-1
二苄胺
→
1033950-81-0
1033950-81-0
+
97-02-9
2,4-二硝基苯胺
135055-48-0
N-(2',4'-dinitrophenyl)-3-phenylpyridinium chloride
+
124-40-3
二甲胺
→
1033950-85-4
(2E,4E)-2-phenyl-5-N,N-dimethylamino-2,4-pentadien-1-al
+
97-02-9
2,4-二硝基苯胺
742-25-6
(2,4-dinitrophenyl) 4-methylbenzenesulfonate
+
7664-41-7
液氨
+
98-95-3
硝基苯
→
51-28-5
2,4-二硝基酚
+
70-55-3
对甲苯磺酰胺
64-17-5
乙醇
+
6526-37-0
1-(2,4-dinitrophenyl)-3-methylpyridin-1-ium,chloride
+
74497-02-2
1-aminobenzene
→
108-99-6
3-甲基吡啶
+
961-68-2
2,4-二硝基二苯胺
64-17-5
乙醇
+
33107-14-1
2-(2,4-dinitrophenyl)isoquinolin-2-ium
+
74497-02-2
1-aminobenzene
→
961-68-2
2,4-二硝基二苯胺
+
97-02-9
2,4-二硝基苯胺
861616-27-5
N-ethyl-N'-(2,4-dinitro-phenyl)-N-nitro-urea
+
7732-18-5
水
→
19091-98-6
N-ethylnitramide
+
15719-64-9
15719-64-9
64-17-5
乙醇
+
110060-49-6
3-acetylamino-1-(2,4-dinitro-phenyl)-pyridinium, chloride
+
74497-02-2
1-aminobenzene
→
961-68-2
2,4-二硝基二苯胺
+
97-02-9
2,4-二硝基苯胺
7647-01-0
氯化氢
+
861295-75-2
acetic acid-(N-chloro-2,4-dinitro-anilide)
+
7782-50-5
氯
+
64-19-7
乙酸
→
97-02-9
2,4-二硝基苯胺
64-17-5
乙醇
+
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
+
100-61-8
N-甲基苯胺
→
97-02-9
2,4-二硝基苯胺
2734-78-3
2,4-dinitro-1-phenylmethoxybenzene
+
7664-41-7
液氨
→
100-51-6
苯甲醇
+
97-02-9
2,4-二硝基苯胺
2217-56-3
1-(2,4-dinitrophenoxy)-2,4-dinitrobenzene
+
7664-41-7
液氨
→
51-28-5
2,4-二硝基酚
+
97-02-9
2,4-二硝基苯胺
7647-01-0
氯化氢
+
53405-99-5
(2Z,4Z)-5-(2,4-dinitroanilino)penta-2,4-dienal
+
74497-02-2
1-aminobenzene
→
5608-83-3
N-(5-phenyliminopenta-1,3-dienyl)aniline
+
97-02-9
2,4-二硝基苯胺
55704-91-1
N,o-dinitroaniline
+
7664-93-9
硫酸
→
606-22-4
2,6-二硝基苯胺
+
97-02-9
2,4-二硝基苯胺
7697-37-2
硝酸
+
121-57-3
对氨基苯磺酸
→
305-80-6
重氮苯磺酸
+
97-02-9
2,4-二硝基苯胺
7664-41-7
液氨
+
98-95-3
硝基苯
+
97-00-7
1-氯-2,4-二硝基苯
→
97-02-9
2,4-二硝基苯胺
64-17-5
乙醇
+
973-02-4
2-(2,4-Dinitrophenyl)-1,2-dihydro-1-isochinolinol
+
74497-02-2
1-aminobenzene
→
97-02-9
2,4-二硝基苯胺
856352-27-7
N'-(2,4-dinitro-phenyl)-N-methyl-N-nitro-urea
+
71-43-2
苯
→
29111-81-7
29111-81-7
+
97-02-9
2,4-二硝基苯胺
6526-37-0
1-(2,4-dinitrophenyl)-3-methylpyridin-1-ium,chloride
+
74497-02-2
1-aminobenzene
→
108-99-6
3-甲基吡啶
+
961-68-2
2,4-二硝基二苯胺
+
91888-49-2
91888-49-2
+
97-02-9
2,4-二硝基苯胺
64-17-5
乙醇
+
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
+
74497-02-2
1-aminobenzene
→
6318-16-7
N,N'-pent-2-ene-1,5-diylidenedianiline monohydrochloride
+
97-02-9
2,4-二硝基苯胺
7664-93-9
硫酸
+
861593-60-4
α-(2,4-dinitro-anilino)-isobutyronitrile
→
97-02-9
2,4-二硝基苯胺
7647-01-0
氯化氢
+
500693-57-2
500693-57-2
→
97-02-9
2,4-二硝基苯胺
7664-93-9
硫酸
+
36965-50-1
2-nitro-toluene-4-sulfonic acid-(2,4-dinitro-anilide)
→
97-02-9
2,4-二硝基苯胺
65052-88-2
1-(2,5-dimethoxyphenyl)-N,N-dimethylpropan-2-amine
+
64-19-7
乙酸
→
7403-38-5
N-benzyl-2,4-dinitroaniline
+
97-02-9
2,4-二硝基苯胺
54718-72-8
2,4-dinitro-N,N-dipropylaniline
+
64-19-7
乙酸
→
97-02-9
2,4-二硝基苯胺
22751-18-4
Urea,N-(2,4-dinitrophenyl)-N'-nitro-
+
7732-18-5
水
→
97-02-9
2,4-二硝基苯胺
837-64-9
2,4-二硝基-N,N-二乙基苯胺
+
64-19-7
乙酸
→
97-02-9
2,4-二硝基苯胺
89-02-1
2,4-二硝基苯磺酸水合物
+
7664-41-7
液氨
→
97-02-9
2,4-二硝基苯胺
53405-99-5
(2Z,4Z)-5-(2,4-dinitroanilino)penta-2,4-dienal
+
64-17-5
乙醇
→
97-02-9
2,4-二硝基苯胺
53405-99-5
(2Z,4Z)-5-(2,4-dinitroanilino)penta-2,4-dienal
+
64-19-7
乙酸
→
97-02-9
2,4-二硝基苯胺
709-49-9
2,4-二硝基碘苯
+
7664-41-7
液氨
→
97-02-9
2,4-二硝基苯胺
64-17-5
乙醇
+
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
+
74497-02-2
1-aminobenzene
→
97-02-9
2,4-二硝基苯胺
7697-37-2
硝酸
+
103-70-8
N-苯基甲酰胺
→
97-02-9
2,4-二硝基苯胺
7664-41-7
液氨
+
610-31-1
1,2,4-trinitrobenzene
→
97-02-9
2,4-二硝基苯胺
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
+
74-89-5
甲胺
→
97-02-9
2,4-二硝基苯胺
7647-01-0
氯化氢
+
53405-99-5
(2Z,4Z)-5-(2,4-dinitroanilino)penta-2,4-dienal
→
97-02-9
2,4-二硝基苯胺
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
+
92-87-5
联苯胺
→
97-02-9
2,4-二硝基苯胺
54948-58-2
2,4-dinitrobenzoyl azide
+
67-64-1
丙酮
→
97-02-9
2,4-二硝基苯胺
110-86-1
吡啶
+
488-43-7
D-萄糖胺
+
97-00-7
1-氯-2,4-二硝基苯
→
97-02-9
2,4-二硝基苯胺
7664-93-9
硫酸
+
36942-33-3
2,6-dichloro-[1,4]benzoquinone-4-(2,4-dinitro-phenylimine)
→
697-91-6
2,6-二氯-1,4-苯醌
+
97-02-9
2,4-二硝基苯胺
4279-47-4
(2,4-dinitro-phenyl)-(4-nitro-benzyl)-ether
+
7664-41-7
液氨
→
619-73-8
对硝基苯甲醇
+
97-02-9
2,4-二硝基苯胺
584-48-5
1-溴-2,4-二硝基苯
+
57-13-6
尿素
→
70297-88-0
(2,4-dinitrophenyl)urea
+
97-02-9
2,4-二硝基苯胺
60-35-5
乙酰胺
+
610-53-7
N-(2,4-二硝基苯基)乙酰胺
+
127-09-3
无水醋酸钠
→
97-02-9
2,4-二硝基苯胺
861616-27-5
N-ethyl-N'-(2,4-dinitro-phenyl)-N-nitro-urea
+
7664-41-7
液氨
→
97-02-9
2,4-二硝基苯胺
742-25-6
(2,4-dinitrophenyl) 4-methylbenzenesulfonate
+
7664-41-7
液氨
→
97-02-9
2,4-二硝基苯胺
7664-93-9
硫酸
+
610-53-7
N-(2,4-二硝基苯基)乙酰胺
→
97-02-9
2,4-二硝基苯胺
20020-13-7
N-(4-nitrophenyl)nitramide
+
7664-93-9
硫酸
+
64-19-7
乙酸
→
97-02-9
2,4-二硝基苯胺
2486-07-9
2,4-二硝基-1-苯氧基苯
+
7664-41-7
液氨
→
97-02-9
2,4-二硝基苯胺
119-27-7
2,4-二硝基苯甲醚
+
7664-41-7
液氨
→
97-02-9
2,4-二硝基苯胺
584-48-5
1-溴-2,4-二硝基苯
+
7664-41-7
液氨
→
97-02-9
2,4-二硝基苯胺
7697-37-2
硝酸
+
103-84-4
乙酰苯胺
→
97-02-9
2,4-二硝基苯胺
610-54-8
2,4-二硝基苯乙醚
+
7664-41-7
液氨
→
97-02-9
2,4-二硝基苯胺
51-28-5
2,4-二硝基酚
+
57-13-6
尿素
→
97-02-9
2,4-二硝基苯胺
60-35-5
乙酰胺
+
97-00-7
1-氯-2,4-二硝基苯
→
97-02-9
2,4-二硝基苯胺
7697-37-2
硝酸
+
100-01-6
4-硝基苯胺
+
67-64-1
丙酮
→
489-98-5
2,4,6-三硝基苯胺
+
97-02-9
2,4-二硝基苯胺
631-61-8
乙酸铵
+
97-00-7
1-氯-2,4-二硝基苯
→
97-02-9
2,4-二硝基苯胺
4096-88-2
1-azido-2,4-dinitrobenzene
→
97-02-9
2,4-二硝基苯胺
74189-90-5
(2R,3S,4E,6E)-8-[(2,4-dinitrophenyl)amino]-3-methoxy-2,4-dimethyl-4,6-octadienal
→
97-02-9
2,4-二硝基苯胺
7664-41-7
液氨
+
97-00-7
1-氯-2,4-二硝基苯
→
97-02-9
2,4-二硝基苯胺
552-32-9
2-硝基乙酰苯胺
→
489-98-5
2,4,6-三硝基苯胺
+
610-53-7
N-(2,4-二硝基苯基)乙酰胺
+
88-74-4
2-硝基苯胺
+
97-02-9
2,4-二硝基苯胺
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
+
124-40-3
二甲胺
→
13984-05-9
1,5-Bis-dimethylamino-pentamethinium, Chloride
+
97-02-9
2,4-二硝基苯胺
51067-73-3
51067-73-3
→
40357-89-9
40357-89-9
+
97-02-9
2,4-二硝基苯胺
55704-91-1
N,o-dinitroaniline
→
606-22-4
2,6-二硝基苯胺
+
97-02-9
2,4-二硝基苯胺
860209-26-3
2,3,4-trinitro-phenetole
→
97-02-9
2,4-二硝基苯胺
860208-92-0
3-ethoxy-2,6-dinitro-aniline
→
97-02-9
2,4-二硝基苯胺
1777-85-1
acetic acid-(4-ethoxy-2,3-dinitro-anilide)
→
97-02-9
2,4-二硝基苯胺
3914-05-4
4-ethoxy-2,3-dinitro-aniline
→
97-02-9
2,4-二硝基苯胺
4280-24-4
2,3-dinitrophenetole
→
97-02-9
2,4-二硝基苯胺
946-80-5
苄基苯基醚
→
97-02-9
2,4-二硝基苯胺
62-44-2
非那西丁
→
97-02-9
2,4-二硝基苯胺
609-73-4
2-硝基碘苯
→
97-02-9
2,4-二硝基苯胺
624-38-4
1,4-二碘苯
→
97-02-9
2,4-二硝基苯胺
108-86-1
溴代苯
→
97-02-9
2,4-二硝基苯胺
636-98-6
4-硝基碘苯
→
97-02-9
2,4-二硝基苯胺
88-74-4
2-硝基苯胺
→
97-02-9
2,4-二硝基苯胺
542-15-4
苯胺硝酸盐
→
97-02-9
2,4-二硝基苯胺
100-25-4
对二硝基苯
→
97-02-9
2,4-二硝基苯胺
119-26-6
2,4-二硝基苯肼
→
97-02-9
2,4-二硝基苯胺
121-57-3
对氨基苯磺酸
→
97-02-9
2,4-二硝基苯胺
53405-99-5
(2Z,4Z)-5-(2,4-dinitroanilino)penta-2,4-dienal
→
1497-49-0
戊二烯醛缩二苯胺盐酸盐
+
97-02-9
2,4-二硝基苯胺
83-25-0
N-苯丁二醯亞胺
→
97-02-9
2,4-二硝基苯胺
3120-04-5
2-甲基-N-苯基马来酰亚胺
→
97-02-9
2,4-二硝基苯胺
709-49-9
2,4-二硝基碘苯
→
97-02-9
2,4-二硝基苯胺
591-50-4
碘苯
→
97-02-9
2,4-二硝基苯胺
51348-06-2
N-hydroxy-2,4-dinitro-Benzenamine
→
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
106707-52-2
(1β,2β,3α,5α)-5-Amino-3-hydroxymethyl-1,2-cyclopentanediol
→
102099-16-1
chlorure de (-)-aminocarbonyl-3-(hydroxymethyl-cis-4-dihydroxy-trans-2,3-cyclopentyl) 1-pyridinium
+
97-02-9
2,4-二硝基苯胺
610-31-1
1,2,4-trinitrobenzene
→
97-02-9
2,4-二硝基苯胺
97-00-7
1-氯-2,4-二硝基苯
+
57-13-6
尿素
→
97-02-9
2,4-二硝基苯胺
103-84-4
乙酰苯胺
→
97-02-9
2,4-二硝基苯胺
33107-14-1
2-(2,4-dinitrophenyl)isoquinolin-2-ium
→
97-02-9
2,4-二硝基苯胺
90403-46-6
potassium 4-amino-3,5-dinitrobenzenesulfonate
→
606-22-4
2,6-二硝基苯胺
+
97-02-9
2,4-二硝基苯胺
4279-47-4
(2,4-dinitro-phenyl)-(4-nitro-benzyl)-ether
→
97-02-9
2,4-二硝基苯胺
2486-07-9
2,4-二硝基-1-苯氧基苯
→
97-02-9
2,4-二硝基苯胺
74497-02-2
1-aminobenzene
→
97-02-9
2,4-二硝基苯胺
610-53-7
N-(2,4-二硝基苯基)乙酰胺
→
97-02-9
2,4-二硝基苯胺
610-54-8
2,4-二硝基苯乙醚
→
97-02-9
2,4-二硝基苯胺
20020-13-7
N-(4-nitrophenyl)nitramide
→
97-02-9
2,4-二硝基苯胺
51-28-5
2,4-二硝基酚
→
97-02-9
2,4-二硝基苯胺
861616-27-5
N-ethyl-N'-(2,4-dinitro-phenyl)-N-nitro-urea
→
97-02-9
2,4-二硝基苯胺
119-27-7
2,4-二硝基苯甲醚
→
97-02-9
2,4-二硝基苯胺
2165-21-1
四唑-1,5-二胺
+
97-00-7
1-氯-2,4-二硝基苯
→
2908-76-1
2,4,2’,4’-四硝基二苯胺
+
97-02-9
2,4-二硝基苯胺
584-48-5
1-溴-2,4-二硝基苯
→
97-02-9
2,4-二硝基苯胺
1176728-02-1
N-tert-butyl-α-(2-hexyloxy-5-nitrophenyl)nitrone
+
4185-69-7
氯化-1-(2,4-二硝基苯基)吡啶嗡盐
→
1176727-68-6
1176727-68-6
+
97-02-9
2,4-二硝基苯胺
149623-84-7
N-(2,4-dinitrophenyl)-2,2,2-trifluoroacetamide
→
97-02-9
2,4-二硝基苯胺
934802-62-7
934802-62-7
→
97-02-9
2,4-二硝基苯胺
13059-86-4
N-butyl-2,4-dinitro-aniline
→
51-28-5
2,4-二硝基酚
+
97-02-9
2,4-二硝基苯胺
903572-19-0
1-(2,4-dinitrophenyl)pyrimidine-2,4-dione
→
97-02-9
2,4-二硝基苯胺
53406-00-1
1-(2,4-dinitrophenyl)pyridin-1-ium-3-carboxamide,chloride
+
14050-66-9
O5-phosphono-ξ-D-ribofuranosylamine
→
1094-61-7
β-烟酰胺单核苷酸
+
7298-94-4
α-nicotinamide mononucleotide
100-01-6
4-硝基苯胺
→
489-98-5
2,4,6-三硝基苯胺
+
97-02-9
2,4-二硝基苯胺