COc1ccc(N2C(=O)[C@H]3[C@@H](C2=O)[C@@H]2C=CC=NN2[C@H]3C(=O)c2ccc(OC(C)=O)cc2)cc1
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?