C=C(CC[C@]12OC(C(=O)O)C(O)(C(=O)O)C(C(=O)O)(O1)C(OC(=O)/C=C/[C@@H](C)C[C@@H](C)CC)C2O)[C@@H](OC(C)=O)[C@H](C)Cc1ccccc1
Heavy atom refers to any atom that is not hydrogen. How many heavy atoms do the molecule have?