LYONDELL - U.S.A
LONZA SWISS
KYOWA HAKKO - JAPAN
DAIICHI PHARMA - JAPAN
BIOFAC - DENMARK
S.M.CHEMICAL
HEBEI SHENGXUE
FYSE (ERCROS)
RIBBON - ITALY
UNIBIOS - ITALY
S.F.CHEMICAL
N.K.CHEMICAL
HEARTWELL
PURE CHEM
QUANTUM
TOSOH
UENO FINE CHEMICAL