[3,6-BIS(ACETYLOXY)-12-HYDROXY-4,6A,12B-TRIMETHYL-11-OXO-9-(PYRIDIN-3-YL)-1,3,4,4A,5,6,6A,12,12A,12B-DECAHYDRO-2H,11H-BENZO[F]PYRANO[4,3-B]CHROMEN-4-YL]METHYL PROPANOATE