prov:value
| - rein R1, R2, R3, R4, R5, R6, R7, and R8 are independently selected from the group consisting of hydrogen, alkanoyl, hydroxy-substituted alkanoyl, and acyloxy-substituted alkanoyl; at least three of R1, R2, R3, R4, R5, R6, R7, and R8 are other than hydrogen; and wherein when R1, R2, R3, R4, R5, R6, R7, and R8 are selected from the group consisting of acetyl and isobutyryl, at least three of R1, R2,
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