5-[2-(2-AMINO-2-CARBAMOYL-ETHYLSULFANYL)-ACETYLAMINO]-2-(3,6-DIHYDROXY-9,9A-DIHYDRO-3H-XANTHEN-9-YL)-BENZOIC ACID c1cc(c(cc1NC(=O)CSC[C@@H](C(=O)N)N)C(=O)O)C2c3ccc(cc3Oc4c2ccc(c4)O)O CYF