2-Amino-4,5,6,7-tetrahydro-1-benzothiophene-3-carbonitrile2-Amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile2-Amino-4,5,6,7-tetrahydro-benzo[b]thiophene-3-carbonitrile2-Amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile2-氨基-4,5,6,7-四氢苯并[b]噻吩-3-腈