O=c1n(Cc2cc3c(cc2Cl)OCO3)c(=O)n2n1CC[C@H]1/C(=N\OCc3ccccc3)[C@H]3O[C@@H]3[C@@H](O)[C@@H]12
How many heavy atoms like carbon, oxygen, nitrogen, sulfur and other non-hydrogen atoms do the molecule contain?