wherein R2 and R3, which may be the same or different and located at {HEAD ~ any positions} of carbons 2, 2′, 3, 3′ and 4 in the benzyl ring, represent hydrogen atoms or halogen atoms, isocyanate groups, either groups, ester groups or {TAIL ~ alkyl groups}, having 1 to 3 carbon atoms, and are optionally substituted with halogen atoms 
wherein R2 and R3 , which may be the same or different and located at { HEAD ~ any positions } of carbons 2 , 2′ , 3 , 3′ and 4 in the benzyl ring , represent hydrogen atoms or halogen atoms , isocyanate groups , either groups , ester groups or { TAIL ~ alkyl groups } , having 1 to 3 carbon atoms , and are optionally substituted with halogen atoms
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH