Rhamnoside, 7-methyl-, monoacetate

An anomaly appeared in the rhamnose series. When acetobromorhamnose was treated with methanol, and the product was deacetylated with alkali, a methyl rhamnoside acetate was obtained which had retained an acetate group not saponifiable by alkali Fischer named this compound 7-methyl rhamnoside monoacetate. It was not until 1930 that it was shown to be the l,2-(methyl orthoacetate) (25). Today, more orthoacetates of the same kind are known in the sugar series. 

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