3-oxochol-4-en-22-oyl-CoA + A <=> 3-oxochola-4,17-dien-22-oyl-CoA + AH2
3-oxochol-4-en-22-oyl-coa + a <=> 3-oxochola-4,17-dien-22-oyl-coa + ah2
3-oxochol-4-en-22-oyl-CoA + A <=> 3-oxochola-4,17-dien-22-oyl-CoA + AH2
3-oxochol-4-en-22-oyl-coa + a <=> 3-oxochola-4,17-dien-22-oyl-coa + ah2