253-52-1
2,3-二氮杂萘
→
~64%
59648-14-5
4,5-哒嗪二甲酸
17412-11-2
4,5-Pyridazinedicarboxylic acid 4,5-dimethyl ester
+
16005-58-6
O-methyl-N,N'-diphenylisourea
102-08-9
N,N'-二苯基硫脲