Pd-C hydrogenation of its diacetate 14 afforded the 4 , 5-dihydro derivative 18 , 19-chloro-21-acetoxypregn-9 ( 11 ) -en-20-one ( 15 ) , its 4-acetoxy derivative 16 and the 3 , 4-diacetoxy derivative 17 .
pd-c hydrogenation of its diacetate 14 afforded the 4 , 5-dihydro derivative 18 , 19-chloro-21-acetoxypregn-9 ( 11 ) -en-20-one ( 15 ) , its 4-acetoxy derivative 16 and the 3 , 4-diacetoxy derivative 17 .
B-other_organic_compound O O O B-other_organic_compound I-other_organic_compound O O B-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound O O O O O B-other_organic_compound I-other_organic_compound O O O B-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound O O