COC1=C(C(=O)OC(C)(C)C)[C@]2(C)C(C(=O)OC(C)(C)C)C(OC)=C(C(=O)OC(C)(C)C)[C@]2(C)C1C(=O)OC(C)(C)C
How many heavy atoms like carbon, oxygen, nitrogen, sulfur and other non-hydrogen atoms do the molecule contain?