9H-16,6a-(Epoxymethano)-15,2,16-(methanoxymetheno)-4H,6aH-naphtho[1',2':7,8]cycloocta[1,2-b]pyrano[4,3-d]pyran-4,12,19,21(12aH)-tetrone,1,2,4a,5,6b,8a,12b,13,14,15,16a,16b-dodecahydro-8a,15-dihydroxy-12a,16b,17-trimethyl-,[2R-(2a,4ab,6aa,6bb,8aa,12ab,12ba