(1R,5R)-3-(2',3',5'-tri-O-benzoyl-β-D-ribofuranosyl)-4-thia-2,6-diazabicyclo[3.2.0]hept-2-en-7-one

benzyl 3-methyl-2-(2-(2',3',5'-tri-O-benzoyl-β-D-ribofuranosyl)thiazol-4-ylcarbonylamino)but-2-enoate