[H]OC(=O)C([H])([H])C([H])([H])C([H])([H])C(\[H])=C(\[H])C([H])([H])C([H])=C([H])C([H])([H])C(\[H])=C(\[H])C([H])(O)C(\[H])=C(\[H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H]