CAS 1840942-14-4 appears in our catalog under these names: C18 Ceramide-d7, C18 Ceramide–d7 (d18：1–d7/18：0), C18 CERAMIDE-D7 (D18:1-D7/18:0), C18-Ceramide-d7, 99.0%. Offered by: TRC, GLPBio, Sigma-Aldrich, MedChemExpress. Available pack sizes: 25mg, 1mg, 500μg, 500 μg (1.75 mM * 500 μL in Methanol:Chloroform (10:90)).