5,8-Dioxa-2,10-diazatridec-12-enoic acid, 13-[1-[(2R,4S,5R)-4-[[(1,1-dimethylethyl)diphenylsilyl]oxy]tetrahydro-5-[(2E)-1-hydroxy-5-[[1-oxo-3-(2-propyn-1-yloxy)propyl]amino]-2-penten-1-yl]-2-furanyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-9-oxo-, bicyclo[6.1.0]non-4-yn-9-ylmethyl ester, (12E)-