2H-Thiopyrano(4,3,2-cd)indole-2-carboxylic acid, 3,5-dihydro-3-methyl-, cis-(-)- 63339-68-4 Chuanghsinmycin Chuangxinmycin cis-(-)-3,5-Dihydro-3-methyl-2H-thiopyrano(4,3,2-cd)indole-2-carboxylic acid