CAS 83-67-0 appears in our catalog under these names: Theophylline-Ethylenediamine EP Impurity G (Caffeine EP Impurity D, Theobromine), Theobromine, >95% (HPLC), Theobromine, Theobromine 0.1 mg/ml in Methanol, Theobromine/ 99.89% (existing batch purity). Offered by: Chemat Brand, TRC, Mikromol, LoGiCal, Dr. Ehrenstorfer. Available pack sizes: on request, 1g, 250mg, 5g, 500mg, 10mg, 100mg, 1ml.