4-nitrobenzyl 8-(acetylamino)-5-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)-3-methyl-9-oxo-6-thia-1,5-diazabicyclo[5.2.0]non-2-ene-2-carboxylate 6-thia-1,5-diazabicyclo[5.2.0]non-2-ene-2-carboxylic acid, 8-(acetylamino)-5-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-3-methyl-9-oxo-, (4-nitrophenyl)methyl ester, (8R)- InChI=1/C25H21N5O8S/c1-13-11-27(29-21(32)17-5-3-4-6-18(17)22(29)33)39-24-19(26-14(2)31)23(34)28(24)20(13)25(35)38-12-15-7-9-16(10-8-15)30(36)37/h3-10,19,24H,11-12H2,1-2H3,(H,26,31)/t19-,24?/m1/s