Pyran
(+)-(3R,4aR,5S,6S,6aS,10S,10aR,10bS)-Dodecahydro-5,6,10,10b-tetrahydroxy-3,4a,7,7,10a-pentamethyl-3-vinyl-1H-naphtho[2,1-b]pyran-1-one 5-acetate 6-ester with N,N-dimethyl-β-alanine
(-)-7,7-Dimethoxy-3-(methoxycarbonylmethyl)-3-(2-oxopropyl)-9,9,10,10-tetrahydroxy-3,3,4,4-tetrahydro-8,8-bi[1H-naphtho[2,3-c]pyran]-1,1-dione