59554-11-9

(5R,3aR,11bR)-4α-Acetyloxy-3,3a,4,5,6,11b-hexahydro-3α,7-dihydroxy-6β-methylspiro[5H-furo[3,2-b]naphtho[2,3-d]pyran-5,2-[2H]pyran]-2,6,11(3H)-trione