Nouveaux acides amines libres de Afzelia bella: trans-hydroxy-4-L-proline et trans-carboxy-4-L-proline

Two new free amino acids have been isolated from seeds of Afzelia bella: trans-4-hydroxy-L-proline and trans-4-carboxy-L-proline. They are accompanied by relatively large quantities of proline, pipecolic, acid, 4-methylene-DL-proline, cis-4-hydroxymethyl-L-proline and 4-methylene-L-glutamic acid. Small amounts of acetylornithine are also present. It is the first time that trans-4-hydroxy-L-proline has been found as a component of the free amino pool of plants.