(αZ)-α-(MethoxyiMino)-N-[(5aR,6R)-1,4,5a,6-tetrahydro-1,7-dioxo-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl]-2-furanacetaMide [ 947723-87-7 ]