4-hydroxybutanoyl-CoA + AMP + diphosphate => 4-hydroxybutanoate + ATP + CoA
4-hydroxybutanoyl-coa + amp + diphosphate => 4-hydroxybutanoate + atp + coa
4-hydroxybutanoyl-CoA + AMP + diphosphate => 4-hydroxybutanoate + ATP + CoA
4-hydroxybutanoyl-coa + amp + diphosphate => 4-hydroxybutanoate + atp + coa