Formula: C22H20N2O7 | Mol. Weight: 424.40 g/mol
IUPAC: (14R,18R,19S,20R)-5,20-dihydroxy-15-methoxycarbonyl-18-methyl-17-oxa-1,11-diazapentacyclo[10.8.1.02,7.08,21.014,19]henicosa-2(7),3,5,8,10,12(21),15-heptaene-10-carboxylic acid
CC1C2C(CC3=C4C(=CC(=N3)C(=O)O)C5=C(N4C2O)C=CC(=C5)O)C(=CO1)C(=O)OC