CCOC(=O)NC(=O)c1cn(CCOCCOC(=O)NCCCCCCNC(=O)OCCOCCn2cc(C(=O)NC(=O)OCC)c(=O)[nH]c2=O)c(=O)[nH]c1=O
How many heavy atoms like carbon, oxygen, nitrogen, sulfur and other non-hydrogen atoms do the molecule contain?