CAS 1083-11-0 appears in our catalog under these names: 4-(2,5-Dimethoxyphenyl)butanoic acid 95%, 4-(2,5-DIMETHOXYPHENYL)BUTYRIC ACID, 95%, 4-(2，5-dimethoxyphenyl)butanoic acid, 95%, 95%, 4-(2,5-DIMETHOXYPHENYL)BUTANOIC ACID, 95%. Offered by: Ambeed, Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g.