COc1ccc2[nH]cc(CCNC(=O)c3cnn(-c4ccc(C)cc4)c3C3CCN(C(=O)OC(C)(C)C)CC3)c2c1
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?