C/C(CCN1CCc2nc(-c3ccccc3)c(-c3ccccc3)cc2C1)=N\O[C@@H](C)c1cc(-c2c(C)cc(C)cc2C)no1
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?