79750-87-1
→
~83%
79750-97-3
2-phenyl-5,6-dihydrothieno[2,3-d][1,3]oxazin-4-one
98-88-4
苯甲酰氯
29108-14-3
ethyl 5-amino-2,3-dihydrothiophene-4-carboxylate