Examples of such a preferred compound include salicylic acid, thiosalicylic acid, {HEAD ~ p hydroxybenzoic acid}, 3,5 dihydroxybenzoic acid, p aminobenzoic acid, {TAIL ~ anthranilic acid}, p hydroxyphenylacetic acid, and the like 
Examples of such a preferred compound include salicylic acid , thiosalicylic acid , { HEAD ~ p hydroxybenzoic acid } , 3,5 dihydroxybenzoic acid , p aminobenzoic acid , { TAIL ~ anthranilic acid } , p hydroxyphenylacetic acid , and the like
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH