1-((4aS,5S,6S,8aS)-6-hydroxy-5,8a-dimethyloctahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-5-yl)but-3-yn-2-one

(4aS,5S,6S,8aS)-(-)-2,4,4a,5,6,7,8,8a-Octahydro-6-hydroxy-5,8a-dimethyl-5-(prop-2-enyl)naphthalen-1(2H)-one 1-(Ethylene Acetal)