prov:value
| - M is a metal or comprises ammonium; R1 is hydrogen, hydroxy, protected hydroxy, or together with R14 or R2 forms a carbonate; R2 is keto, ???OT2, acyloxy, or together with R1 forms a carbonate; R4 is ???OT4 or acyloxy; R7 is acyloxy; R9 is hydrogen, keto, ???OT9, or acyloxy;, R10 is acyloxy provided, however, R10 is other than acetoxy and R7 and R10 are different; R13 is hydroxy, protected hydroxy
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