InChI=1S/C50H74O14/c51-39-29-25-37(35-40(39)52)27-31-43(54)61-33-23-21-19-17-15-13-11-9-7-5-3-1-2-4-6-8-10-12-14-16-18-20-22-24-34-62-44(55)32-28-38-26-30-42(41(53)36-38)63-50-47(58)45(56)46(57)48(64-50)49(59)60/h25-32,35-36,45-48,50-53,56-58H,1-24,33-34H2,(H,59,60)/b31-27?,32-28+