COc4ccc(c2oc1c(CCC(C)C)c(O)cc(O)c1c(=O)c2O[C@@H]3O[C@@H](C)[C@H](O)[C@@H](O)[C@H]3O)cc4 7CA_301_2H44 4.144 159.053 37 516.543 10 5 1 7 457.01