tokens: With hot acetic + p-toluenesulfonic acid 5 underwent rearrangement to 21-acetoxy-11 beta , 19-epoxypregn-5-ene-4 , 20-dione ( 8 ) Pd-C hydrogenation of 3 , 21-diacetoxy-5 beta , 19-cyclopregna-2 , 9 ( 11 ) -diene-4 , 20-dione ( 10 ) gave 3 , 21-diacetoxy-5 beta , 19-cyclopregn-5-ene-4 , 20-dione ( 11 ) and the 9 , 11-dihydro derivative of the latter .