a process for the synthesis of copolymer - 1 composed of l - alanine , lhysine , l - glutamic acid and l - tyrosine for the treatment of multiple sclerosis . the molecular weight of copolymer - 1 is between 8 - 19 kda . process is initiated by supported dialkyl amine . the copolymer - 1 of the invention has acid content of less than 1 %.