Synonyms: Bufa-20,22-dienolide,7,8-epoxy-11,12,14-trihydroxy-2,2,3-[(tetrahydro-6-methyl-2H-pyran-4,3,2-triyl)tris(oxy)]-,[2b(2S,3S,4S,6S),3b,5a,7b,11a,12b]-;13H-11,12a-Epoxy-9H-cyclopent[7,8]oxireno[8a,9]phenanthro[2,3-b]pyrano[3,2-e][1,4]dioxin,bufa-20,22-dienolide deriv.; (+)-Orbicuside B; Orbicuside B