83920-54-1 EINECS 281-314-7 L-Lysine, compd. with 3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione (1:1) L-Lysine, compound with 3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione (1:1) Lysine theophyllinate Lysine theophylline