label: N-((1-(1-carboxymethyl-5,6,7,8-tetrahydrobenzo(f)quinoxaline-2,3-(1H,4H)-dion-9-yl)pyrrol-3-yl)methyl)-N'-(4-carboxyphenyl)urea
label_lc: n-((1-(1-carboxymethyl-5,6,7,8-tetrahydrobenzo(f)quinoxaline-2,3-(1h,4h)-dion-9-yl)pyrrol-3-yl)methyl)-n'-(4-carboxyphenyl)urea