Carfecillin

(2S,5R,6R)-3,3-dimethyl-7-oxo-6-[ [3-oxo-3-(phenoxy)-2-phenylpropanoyl]amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

O=C(O)[C@@H]3N4C(=O)[C@@H](NC(=O)C(c1ccccc1)C(=O)Oc2ccccc2)[C@H]4SC3(C)C

InChI=1S/C23H22N2O6S/c1-23(2)17(21(28)29)25-19(27)16(20(25)32-23)24-18(26)15(13-9-5-3-6-10-13)22(30)31-14-11-7-4-8-12-14/h3-12,15-17,20H,1-2H3,(H,24,26)(H,28,29)/t15?,16-,17+,20-/m1/s1 ^Y

Key:NZDASSHFKWDBBU-KVMCETHSSA-N ^Y