Showing structure for (2R,4bR,7aS,7bR,8R,11R,13aR,13bR,14R,15S)-2,3,4b,7a,7b,8,13b,14,15,18-Decahydro-2,11-diphenyl-11H-8,13a[2',3']-furanofuro[3',2':3,4]naphtho[1,2-b:7,8-b']dipyran-4,6,13,17(5H,12H)-tetrone