Cc1ccccc1NC(=O)Cn1c(=O)n(Cc2ccc3c(c2)OCO3)c(=O)c2ccc(C(=O)NC3CCCCC3)cc21
Heavy atom refers to any atom that is not hydrogen. The heavy atoms in molecules are carbon, oxygen, nitrogen, and sulfur. How many heavy atoms are in the molecule?