O=C1C(c2ccccc2)=C(c2ccccc2)C(c2ccc(Sc3ccc(C4=C(c5ccccc5)C(=O)C(c5ccccc5)=C4c4ccccc4)cc3)cc2)=C1c1ccccc1
All atoms other than hydrogen are referred to be heavy atoms. How many heavy atoms are there in the molecule?