What is Erlenmeyer rule? and what it is used to?

1.	What is Erlenmeyer rule? and what it is used to?
Answer» YER was the first chemist to synthesize tyrosine, guanidine, creatine, and CREATININE (3 ). In 1880, the Erlenmeyer RULE indicated that all alcohols in which the hydroxyl GROUP was attached DIRECTLY to a double-bonded carbon atom became aldehydes or ketones.

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