[H]N(C([H])([H])[H])C([H])([H])C([H])([H])C([H])([H])C12C3=C([H])C([H])=C([H])C([H])=C3C([H])(C3=C([H])C([H])=C(O)C([H])=C13)C([H])([H])C2([H])[H]