COC(=O)C1=C(OC(=O)/C(=C/c2ccc(Cl)cc2)c2ccccc2)C(C(=O)OC)[C@@]2(O)[C@@H](C(=O)OC)[C@H](C)C[C@@H]1[C@@H]2C(=O)OC
Heavy atom refers to any atom that is not hydrogen. How many heavy atoms do the molecule have?