prov:value
| - yl, substituted thioalkyl, aryl, heteroaryl, heterocyclic, nitro, cyano, carboxyl, carboxyl esters, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, amino, and substituted amino; [0269] b is an integer equal to 0 or 1; [0270] W is selected from the group consisting of: [0271] hydrogen, [0272] phosphate (including monophosphate, diphosphate, triphosphate or a st
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