CCOC(=O)c1c(N2CCCC2)[nH]c(=O)c(C(c2ccc(Cl)c([N+](=O)[O-])c2)c2c(O)c(C(=O)OCC)c(N3CCCC3)[nH]c2=O)c1O
How many heavy atoms like carbon, oxygen, nitrogen, sulfur and other non-hydrogen atoms do the molecule contain?