PROCEDIMIENTO PARA LA PREPARACION DE NUEVAS SUSTANCIAS WS 6049.

摘要

Biologically active WS 6049 substances obtainable by culturing a strain belonging to the genus Actinomadura in an aqueous nutrient medium under aerobic conditions and recovering WS 6049-A substance and/or WS 6049-B substance. The invention also relates to a process for preparing the new substances and pharmaceutical compositions comprising such substances as an active ingredient together with a non-toxic, pharmaceutically acceptable carrier.