3-Pyridinecarboxylicacid,7,10-bis(acetyloxy)-5a-[(acetyloxy)methyl]octahydro-2,2,9-trimethyl-6-(2-methyl-1-oxobutoxy)-2H-3,9a-methano-1-benzoxepin-5-ylester, [3R-[3a,5b,5aa,6a(S*),7a,9a,9aa,10R*]]-