Patent ID: 8455547

Claim:
A compound of the formula: wherein a dashed line represents the presence or absence of a bond; Y has from 0 to 14 carbon atoms and is: an organic acid functional group, or an amide or ester thereof; hydroxymethyl or an ether thereof; or a tetrazolyl functional group; X is halo, ═S, —SH, —CF 3 , —CN, ═CHalkyl or ═C(alkyl) 2 having from 1 to 6 carbon atoms; Z is halo, —OH, —OR, —SH, —CF 3 , or —CN; each R 1 is independently O, S, CH 2 , or if R 1 forms a double bond to another R′, then both are CH, provided that O—O, S—O, and O—S are not present, and each R is independently —H, C 1-6 alkyl, C 1-6 hydroxyalkyl, or C 1-6 acyl.