Thursday, December 17, 2009

How to give numbering for a heterocyclic compound when a corboxylic group is present?

for example if we take furoate i.e., furan with a corboxylic group shall i start numbering from C OF CARBOXYLIC GROUP OR FROM HETERO ATOM.How to give numbering for a heterocyclic compound when a corboxylic group is present?
Number from the hetero atom. A furan ring with a carboxyl group on the carbon alpha to the ring oxygen would be furan-2-carboxylic acid.

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