Z3 represents the atoms necessary to complete {HEAD ~ a mono or bicyclic aromatic or heterocyclic ting system} containing {TAIL ~ 5 to 10 ring atoms} and C is in an ortho or para position relative to W 
containing
Z3 represents the atoms necessary to complete { HEAD ~ a mono or bicyclic aromatic or heterocyclic ting system } containing { TAIL ~ 5 to 10 ring atoms } and C is in an ortho or para position relative to W
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH