CCOC(=O)NC(=O)c1cn(CCSCCOC(=O)NCCCCCCNC(=O)OCCSCCn2cc(C(=O)NC(=O)OCC)c(=O)n(C)c2=O)c(=O)n(C)c1=O
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?