Dimemorfan
Dimemorfan (INN; JAN dimemorfan phosphate; also known as dimemorphan and 3,17-dimethylmorphinan; brand names Astomin, Dastosirr, and Tusben) is an antitussive (cough suppressant) of the morphinan family that is widely used in Japan and is also marketed in Spain and Italy. It was developed by Yamanouchi Pharmaceutical (now Astellas Pharma) and introduced in Japan in 1975.