Patent ID: 7488494

Claim:
A compound of formula: wherein: R 1 and R 2 are independently chosen from hydrogen, hydroxy, OC(O)R 10 and alkyl, W is chosen from hydrogen, halo, and alkyl, X is O, T is chosen from hydrogen, halo, and alkyl, R 6 is hydrogen, R 14 is independently chosen from hydroxy, OR 9, OC(O)R 10 , OS(O)R 10 , CHO, C(O)R 10 , COOH, CO 2 R 10 , CONR 3 R 4 , alkyl, haloalkyl, aryl, arylalkyl, thio, alkylthio, amino, alkylamino, dialkylamino, nitro, and halo, R 3 is chosen from hydrogen, alkyl, aryl, arylalkyl, an amino acid, C(O)R 11 where R 11 is hydrogen alkyl, aryl, arylalkyl, an amino acid, and CO 2 R 12 where R 12 is hydrogen, alkyl, aryl, or arylalkyl; R 4 is chosen from hydrogen, alkyl, and aryl; or R 3 and R 4 taken together with the nitrogen to which they are attached are chosen from pyrrolidinyl and piperidinyl; R 9 is chosen from alkyl, haloalkyl, aryl, arylalkyl, C(O)R 11 , and Si(R 13 ) 3 where each R 13 is independently chosen from hydrogen, alkyl, and aryl; and R 10 is chosen from hydrogen, alkyl, haloalkyl, amino, aryl, arylalkyl, an amino acid, alkylamino, and dialkylamino; with the proviso that when R 1 is hydrogen, hydroxy or OC(O)R A is alkyl or an amino acid, R 2 is hydrogen, hydroxy, or OC(O)R A where R A is as previously defined, T is hydrogen, and W is hydrogen, then R 14 is not hydroxy, acyloxy, methoxy, or alkyl.