COC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(Cc1ccc(OCc2ccccc2)cc1)NC(=O)C(COCc1ccccc1)NC(=O)OC(C)(C)C
All atoms other than hydrogen are referred to be heavy atoms. How many heavy atoms are there in the molecule?