ethyl 2-(1-[(6-chlorobenzo[b]thiophen-2-yl)sulfonyl]-4-{[4-(iminopyrrolidinylmethyl)phenyl]methyl}-3-oxopiperazin-2-yl)acetate 生成 2-(1-[(6-Chlorobenzo[b]thiophen-2-yl)sulfonyl]-4-{[4-(iminopyrrolidinylmethyl) phenyl]methyl}-3-oxopiperazin-2-yl)acetic acid