[ 실시 예 81 ] Dimethyl 10 - bromo - 8 - methyl - 2 -( phenylsulfonyl ) - 4 a , 5 - dihydro - 8 H - pyrido [ 1 ', 2 ': 4 , 5 ] [ 1 , 4 ] diazepino [ 2 , 3 - b ] indole - 5 , 6 - dicarboxylate ( 화합물 1 - 1 w ) 의 제조