COC(=O)[C@H](Cc1ccccc1)NC(=O)N1CCCN(C(=O)N[C@@H](Cc2ccccc2)C(=O)OC)CCCN(C(=O)N[C@@H](Cc2ccccc2)C(=O)OC)CCC1
All atoms other than hydrogen are referred to be heavy atoms. How many heavy atoms are there in the molecule?