CHEMBRDG-BB 6150516;9-ETHYL-8-OXO-6,7,8,9-TETRAHYDRO-5H-CARBAZOLE-3-CARBOXYLIC ACID;TIMTEC-BB SBB012018;9-ETHYL-1-OXO-2,3,4,9-TETRAHYDRO-1H-CARBAZOLE-6-CARBOXYLIC ACID
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