Mattu, SDhar, S KSindhwani, S KRay, N K1996-01-012009-06-011996-01-012009-06-011996-01-01Mattu S, Dhar SK, Sindhwani SK, Ray NK. Analgesic efficacy of two derivatives of O-hydroxy-naphthoquinone. Indian Journal of Physiology and Pharmacology. 1996 Jan; 40(1): 103-4http://imsear.searo.who.int/handle/123456789/107817engAnalgesics, Non-Narcotic --pharmacologyAnimalsFemaleMaleMiceNaphthoquinones --chemical synthesisPain MeasurementRatsLetter