prov:value
| - mino acid derivative which cyclizes after cleavage of the glycosyl radical, where the substituent, R is a hydrogen atom, methyl, methoxy, carboxyl, CN, methylcarbonyl, hydroxyl, nitro, fluorine, chlorine, bromine, sulfonyl, sulfonamide or sulfon-(C1 -C4)-alkylamide, p is 0 or 1, n is an integer, x is an oxygen atom, NH, methyleneoxy, methyleneamino or methylene-(C1 -C4)-alkylamino and Y is an oxyg
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