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Den norske Eterfabrikk (DnE) is a pharmaceutical/chemical company developing, manufacturing and marketing prescription drugs, OTC, cosmetics and chemicals.
DnE was established on February 2, 1900, and is the world's oldest producer of ether. It is located in Oslo, Norway at the south end of the lake Østensjøvannet.
References
Den norske Eterfabrikk Wikipedia(Text) CC BY-SA