Absolute configuration of (-)-5-benzoyl-1,2-dihydro-3H-pyrro-lo[l,2a]pyrrole-l-carboxylic acid, the active enantiomer of ketorolac - Guzman, A; Yuste, F; Toscano, RA; Young, JM; van Horn, AR; Muchowski, JM (J MedChem, 1986)