2H,11H-Naphtho[2,1-b]pyrano[3,4-e]pyran-11-one,1,3,4,4a,5,6,6a,12,12a,12b-decahydro-4,4,6a,12b-tetramethyl-3-(1-oxopropoxy)-9-(3-pyridinyl)-,[3S-(3a,4ab,6aa,12ab,12ba)]-