Cefuroxime sodium Imp. H (EP): (5aR,6R)-6-[[(Z)-(furan-2-yl)(methoxyimino)acetyl]amino]-5a,6-dihydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazine-1,7(4H)-dione.