a compound having an active hydrogen and an acid group, said {HEAD ~ compound} being selected from {TAIL ~ the group} consisting of salicylic acid, thiosalicylic acid, p hydroxybenzoic acid, 3,5 dihydroxybenzoic acid, p aminobenzoic acid, anthranilic acid, and p hydroxyphenylacetic acid, 
selected from
a compound having an active hydrogen and an acid group , said { HEAD ~ compound } being selected from { TAIL ~ the group } consisting of salicylic acid , thiosalicylic acid , p hydroxybenzoic acid , 3,5 dihydroxybenzoic acid , p aminobenzoic acid , anthranilic acid , and p hydroxyphenylacetic acid ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL 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