Keywords: Delta-1-pyrroline-5-carboxylic acid.svg Skeletal formula of delta-1-pyrroline-5-carboxylic acid Created using http //www acdlabs com/download/chemsk html ACD/ChemSketch 10 0 and Inkscape Own 2007-05-30 Fvasconcellos 01 54 31 May 2007 UTC Carboxylic acids Pyrrolines |