C[C@H]1O[C@@H](OC2CC[C@]3(C=O)[C@H]4CC[C@]5(C)[C@@H](C6=CC(=O)OC6)CC[C@]5(O)[C@@H]4CC[C@]3(O)C2)CC2OC(C)(C)OC21
Heavy atom refers to any atom that is not hydrogen. How many heavy atoms do the molecule have?