Synonyms: Spiro[cyclohexane-1,4'(3'H)-[1H-7,9a]methanocyclohepta[c]pyran]-2-carboxaldehyde,4-(acetyloxy)-3-[(acetyloxy)methyl]hexahydro-5'-hydroxy-3-methyl-8'-methylene-4',9'-dioxo-,[4'R-[4'a(2S*,3R*,4S*),4'aa,5'b,7'b,9'ab]]-; (-)-Coetsin B; Coetsin B