Abstract: A compound of the structure ##STR1## wherein R.sup.1 and R.sup.2 are each, independently, hydrogen or --CO(CR.sup.3 R.sup.4).sub.b (CR.sup.5 R.sup.6).sub.d CR.sup.7 R.sup.8 R.sup.9 ;R.sup.3 and R.sup.4 are each, independently, hydrogen, alkyl, alkenyl, alkynyl, trifluoromethyl, or --F;R.sup.5 and R.sup.6 are each, independently, hydrogen, alkyl, alkenyl, alkynyl, --(CR.sup.3 R.sup.4).sub.f OR.sup.10, --CF.sub.3, --F, or --CO.sub.2 R.sup.11, or R.sup.5 and R.sup.6 may be taken together to form X or a cycloalkyl ring that is optionally mono-, di-, or tri-substituted with --(CR.sup.3 R.sup.4).sub.f 0R.sup.10 ;R.sup.7 is hydrogen, alkyl, alkenyl, alkynyl, --(CR.sup.3 R.sup.4).sub.f OR.sup.10, --CF.sub.3, --F, or --CO.sub.2 R.sup.11 ;R.sup.8 and R.sup.9 are each, independently, hydrogen, alkyl, alkenyl, alkynyl, --(CR.sup.3 R.sup.4).sub.f OR.sup.10, --CF.sub.3, --F, or --CO.sub.2 R.sup.11, or R.sup.8 and R.sup.

Abstract: A compound of the structure wherein R1 and R2 are each, independently, hydrogen or —CO(CR3R4)b(CR5R6)dCR7R8R9; R3 and R4 are each, independently, hydrogen, alkyl, alkenyl, alkynyl, trifluoromethyl, or —F; R5 and R6 are each, independently, hydrogen, alkyl, alkenyl, alkynyl, —(CR3R4)fOR10, —CF3, —F, or —CO2R11, or R5 and R6 may be taken together to form X or a cycloalkyl ring that is optionally mono-, di-, or tri-substituted with —(CR3R4)fOR10; R7 is hydrogen, alkyl, alkenyl, alkynyl, —(CR3R4-)fOR10, —CF3, —F, or CO2R11; R8 and R9 are each, independently, hydrogen, alkyl, alkenyl, alkynyl, —(CR3R4)fOR10, —CF3, —F, or —CO2R11, or R8 and R9 may be taken together to form X or a cycloalkyl ring that is optionally mono-, di-, or tri-substituted with —(CR3R4-)fOR10; R10 is hydrogen, alkyl, alkenyl, alkynyl, tri-(alkyl)silyl, tri-(alkyl)silylethyl, triphenylmethyl, benzyl, alkoxymethyl, tri-(alkyl)silylethoxymethyl, chloroethyl, or tetrahydropyranyl; R11 is hydrogen, alkyl, alkenyl, alkynyl, or phenylalkyl; X is