Treatment of 10 with warm HCl furnished 19-chloro-4 , 21-dihydroxypregna-4 , 9 ( 11 ) -diene-3 , 20-dione ( 13 ) .
treatment of 10 with warm hcl furnished 19-chloro-4 , 21-dihydroxypregna-4 , 9 ( 11 ) -diene-3 , 20-dione ( 13 ) .
O O O O B-inorganic I-inorganic 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