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Question
Find out all the functional groups present in the following polyfunctional compound.
Penicillin G, a naturally occurring antibiotic.
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Solution
Functional groups: Secondary amide \[\begin{array}{cc}\ce{O}\phantom{....}\\||\phantom{....}\\\ce{(-C-NH),}\end{array}\] carboxylic acid (–COOH), tertiary amide \[\begin{array}{cc}|\phantom{.....}\\\ce{- N - C -},\\\phantom{....}||\\\phantom{....}\ce{O}\end{array}\] thioether (R-S-R) groups are present in penicillin G.
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