O=P1(NCCCn2cc[n+](Cc3nc4ccccc4[nH]3)c2)C=C(c2ccccc2)OC(c2ccccc2)=C1.[Cl-]
Aromatic rings (also known as aromatic compounds or arenes) are hydrocarbons which contain benzene, or some other related ring structure. How many aromatic rings does the molecule contain?