P(=O)(OC1CCC2(C)C(CCC3C2CCC4(C)C(CC5OC345)C6=COC(=O)C=C6)C1)(OC7CCC8(C)C(CCC9C8CCC%10(C)C(CC%11OC9%10%11)C%12=COC(=O)C=C%12)C7)OC%13CCC%14(C)C(CCC%15C%14CCC%16(C)C(CC%17OC%15%16%17)C%18=COC(=O)C=C%18)C%13