What Swiss multinational healthcare company, introduced the steroidal progestin, Trengestone, in 1974?
Trengestone:  It was synthesized in 1964 and was introduced for medical use by Roche in 1974. Hoffmann-La Roche: F. Hoffmann-La Roche AG is a Swiss multinational healthcare company that operates worldwide under two divisions: Pharmaceuticals and Diagnostics.
i don't know