Showing structure for (1r,3r,4as,5s,6s,6as,7r,10r,10as,10bs)-6,10-bis(acetyloxy)-3-ethenyl-5-hydroxy-7-(hydroxymethyl)-3,4a,7,10a-tetramethyl-octahydro-1h-naphtho[2,1-b]pyran-1-yl acetate