Denka Begins Producing Raw Materials for Avigan as Effort Against Novel Coronavirus on May 21, 2020 in Coronavirus, Materials Denka Co. Ltd. (TYO:4061) recently began production of diethyl malonate for use in Avigan, a potential COVID-19 treatment known also…... Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here Continue Reading