Y is a phenyl group which may be optionally mono , di , or tri substituted with a group selected from alkyl of 1 6 carbon atoms, aralkyl of {TAIL ~ 7 10 carbon atoms}, alkoxy of 1 6 carbon atoms, cyano, halo, nitro, carbalkoxy of 2 7 carbon atoms, trifluoromethyl, dialkylamino of 1 6 carbon atoms per alkyl group, {HEAD ~ alkylthio} of 1 6 carbon atoms, SO3 H, PO3 H, or CO2 H 
Y is a phenyl group which may be optionally mono , di , or tri substituted with a group selected from alkyl of 1 6 carbon atoms , aralkyl of { TAIL ~ 7 10 carbon atoms } , alkoxy of 1 6 carbon atoms , cyano , halo , nitro , carbalkoxy of 2 7 carbon atoms , trifluoromethyl , dialkylamino of 1 6 carbon atoms per alkyl group , { HEAD ~ alkylthio } of 1 6 carbon atoms , SO3 H , PO3 H , or CO2 H
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH