(4R,5S)-(pivaloyloxy)methyl 3-((1-(4,5-dihydrothiazol-2-yl)azetidin-3-yl)thio)-5-((2S,3R)-3-hydroxy-1-oxo-1-((pivaloyloxy)methoxy)butan-2-yl)-4-methyl-4,5-dihydro-1H-pyrrole-2-carboxylate
(4R,5S)-(pivaloyloxy)methyl 3-((1-(4,5-dihydrothiazol-2-yl)azetidin-3-yl)thio)-5-((2S,3R)-3-hydroxy-1-oxo-1-((pivaloyloxy)methoxy)butan-2-yl)-4-methyl-4,5-dihydro-1H-pyrrole-2-carboxylate