The polyurethane resin has at least one carboxyl group at an end of the main chain, while having an ethylenically unsaturated group in a side chain.

In the tissues of higher animals, additional double bonds can only be inserted between an existing double bond and the carboxyl group.

Consequently, acetic acid is written CH3COOH to show that there is a CH3 group bonded by one carbon atom to the carboxylic group COOH.

The hydroxyl group on the carboxylic acid is replaced by an NH2 group.

The OH of acetic acid is replaced by an NH2 group.

A macromonomer comprises an α,β-conjugated terminal carboxylic group and a plurality of hydrophilic groups.

The polyurethane resin has at least one carboxyl group at an end of the main chain, while having an ethylenically unsaturated group in a side chain.

In addition, the invention provides precursor compounds containing an unprotected carboxylic acid group which can be used in such a method.

The first monomer is such that the copolymer is thermally responsive and the second monomer comprises a carboxylic acid or carboxylate group.

The carboxyl group (–COOH) can react with alcohols, forming several useful esters.

The carboxyl group (-COOH) can react with alcohols, forming several useful esters.

The carboxyl group (–COOH) can react with alcohols, forming numerous esters.

The carboxyl group (COOH) can react with alcohols, forming several useful esters.

Fatty acids are carbon chains with a carboxylic acid group at one end. © DR

The main pathway of metabolism is the hydrolysis of the S-fluoromethylcarbothioate group with the formation of a 17? -carboxylic acid metabolite.