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(2007/10/02)<17,16a-d>-2'-methyloxazoline derivative of 20,20-dimethoxypregn-5-ene-3β,21-diol
<17,16a-d>-2'-methyloxazoline derivative of 3β,21-dihydroxypregn-5-en-20-one
<17,16a-d>-2'-methyloxazoline derivative of 3β-hydroxypregn-5-en-20-one
<17,16a-d>-2'-methyloxazoline derivative of 21-acetoxy-3β-hydroxypregn-5-en-20-one