(R)(-)-6-(2'-Hydroxypropyl)chromone-2-carboxylate (R)-6-(2-Hydroxypropyl)-4-oxo-4H-1-benzopyran-2-carboxylic acid (S)(-)-6-(2'-Hydroxypropyl)chromone-2-carboxylate 141474-83-1 4H-1-Benzopyran-2-carboxylic acid, 6-(2-hydroxypropyl)-4-oxo-, (R)- 6-(2'-Hydroxypropyl)chromone-2-carboxylate Methyl-hpcca