C[C@@H](CO)N1C[C@@H](C)[C@@H](CN(C)CC2CC2)Oc2c(NC(=O)c3nc4ccccc4s3)cccc2C1=O
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?