2-[3-(5-carbamimidoyl-1H-indol-2-yl)-4-hydroxy-5-(3-nitrophenyl)phenyl]acetic acid
2-[3-(5-amidino-1H-indol-2-yl)-4-hydroxy-5-(3-nitrophenyl)phenyl]acetic acid
2-[3-(5-carbamimidoyl-1H-indol-2-yl)-4-hydroxy-5-(3-nitrophenyl)phenyl]ethanoic acid