(+)-Isomethadone (5R)-Isomethadone 26594-41-2 3-HEXANONE, 6-(DIMETHYLAMINO)-4,4-DIPHENYL-5-METHYL-, (R)- Isomethadone d-form d-6-(Dimethylamino)-4,4-diphenyl-5-methyl-3-hexanone d-Isoamidone