Ono Pharmaceutical Co. Ltd. and Wuxi Apptec Co. Ltd. have jointly developed new ceramide glucosyltransferase (glucosylceramide synthase; GLCT-1) and lysosomal acid glucosylceramidase (GBA; β-glucocerebrosidase; β-glucosidase) dual inhibitors reported to be useful for the treatment of mild cognitive impairment, among others.