is ox az ol - 1 7 α - eth yn yl test oster one ▁or ▁as ▁ 1 7 α - eth yn yl - 1 7 β - h ydro xy andro st - 4 - en - [ 2 , 3 - d ] is ox az ole , ▁is ▁a ▁synth etic ▁and rost ane ▁ster oid ▁and ▁a ▁derivative ▁of ▁test oster one ▁and ▁eth ister one ▁( 1 7 α - eth yn yl test oster one ). ▁It ▁is ▁specifically ▁the ▁derivative ▁of ▁eth ister one ▁where ▁the ▁C 3 ▁k et one ▁is ▁replaced ▁with ▁a ▁ 2 , 3 - is ox az ole ▁mo iety ▁( i . e ., ▁an ▁is ox az ole ▁ring ▁is ▁f used ▁to ▁the ▁A ▁ring ▁at ▁the ▁C 2 ▁and ▁C 3 ▁positions ). ▁E this ter one ▁is ▁a ▁weak ▁pro gest in ▁with ▁weak ▁and ro gen ic ▁activity . ▁ ▁History ▁Dan az ol ▁was ▁synth es ized ▁in ▁ 1 9 6 3 ▁by ▁a ▁team ▁of ▁scient ists ▁at ▁Ster ling ▁Win th rop ▁in ▁R ens sel a er , ▁New ▁York ▁by ▁a ▁team ▁that ▁included ▁Hel m utt ▁Ne umann , ▁Gordon ▁Pot ts , ▁W . T . ▁Ryan , ▁and ▁Freder ik ▁W . ▁St on ner . ▁It ▁was ▁approved ▁by ▁the ▁ ▁Food ▁and ▁D rug ▁Administration ▁in ▁ 1 9 7 1 ▁as ▁the ▁first ▁drug ▁in ▁the ▁country ▁to ▁specifically ▁treat