ChEBI: 4-hydroxy-1-pyrroline-2-carboxylic acid is a 1-pyrrolinecarboxylic acid having a hydroxy substituent at the 4-position. It has a role as a mouse metabolite. It is a dehydroamino acid and a 1-pyrrolinecarboxylic acid. It is a conjugate acid of a 4-hydroxy-1-pyrroline-2-carboxylate.