CAS 56421-09-1 appears in our catalog under these names: 18:1(11-CIS) PC, 18:1(11-cis) PC, 99.0%. Offered by: Sigma-Aldrich, MedChemExpress. Available pack sizes: 25MG, 10 mg (12.72 mM * 1 mL in Chloroform), 5 mg (12.72 mM * 500 μL in Chloroform), 25 mg (12.72 mM * 2.5 mL in Chloroform).