COC(=O)[C@H]1[C@H](OC)[C@@H](OC(=O)/C=C\c2cc(OC)c(OC)c(OC)c2)C[C@H]2CN3CCc4c([nH]c5cc(OC)ccc45)[C@@H]3C[C@H]21
How many heavy atoms like carbon, oxygen, nitrogen, sulfur and other non-hydrogen atoms do the molecule contain?