P7(OCCN(CCOP1Oc2c(cc(cc2C(C)(C)C)C(C)(C)C)c3cc(cc(c3O1)C(C)(C)C)C(C)(C)C)CCOP4Oc5c(cc(cc5C(C)(C)C)C(C)(C)C)c6cc(cc(c6O4)C(C)(C)C)C(C)(C)C)Oc8c(cc(cc8C(C)(C)C)C(C)(C)C)c9cc(cc(c9O7)C(C)(C)C)C(C)(C)C