Benzhydryl 7-[[2-(2-amino-5-chloro-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-3-[[2-[[1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidin-3-yl]sulfanylmethyl]-3-pyridinyl]sulfanyl]-8-oxo-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate