CCCCCNC(=O)[C@H](Cc1ccc(N(C(=O)C(=O)O)c2ccccc2C(=O)O)c(/C=C/C(N)=O)c1)NC(=O)[C@H](Cc1ccccc1)NC(=O)CCC(=O)O
All atoms other than hydrogen are referred to be heavy atoms. How many heavy atoms are there in the molecule?