NCc1ccccc1-c1c2nc(c(-c3ccccc3CN)c3ccc([nH]3)c(-c3ccccc3CN)c3nc(c(-c4ccccc4CN)c4ccc1[nH]4)C=C3)C=C2
All atoms other than hydrogen are referred to be heavy atoms. How many heavy atoms are there in the molecule?