[(7aR,7R)-4-(6,6-dimethyl-1,5-dioxo-2,4-dioxahept-1-yl)-7-{[(2Z)-2-(2-{[({4-[(2Z)-1-{[(7aR,7R)-3-[(carbamoyloxidanyl)methyl]-4-(6,6-dimethyl-1,5-dioxo-2,4-dioxahept-1-yl)-6-oxo-2,6,7,7a-tetrahydroazeto[2,1-b][1,3]thiazin-7-yl]amino}-1-oxopent-2-en-2-yl]-1,3-thiazol-2-yl}amino)methyl]amino}-1,3-thiazol-4-yl)-1-oxopent-2-enyl]amino}-6-oxo-2,6,7,7a-tetrahydroazeto[2,1-b][1,3]thiazin-3-yl]methyl aminomethanoate