O=C1NC[C@H](Cc2ccccc2)N(C[C@@H]2CCCN2C[C@H](Cc2ccccc2)N2C[C@H](Cc3ccccc3)N(CC3CCCCC3)C(=O)C2=O)C1=O
Molecular masses are calculated from the standard atomic weights of each element. What is the molecular mass of this molecule?