3-Pyridinecarboxylicacid,10-(acetyloxy)-5a-[(acetyloxy)methyl]-4,5-bis(benzoyloxy)octahydro-9-hydroxy-2,2,9-trimethyl-2H-3,9a-methano-1-benzoxepin-6,7-diylester, [3R-(3a,4a,5b,5aa,6a,7a,9b,9aa,10R*)]-