2 (R)-3-hydroxybutanoate + H(+) => (3R)-hydroxybutanoate dimer + H2O
2 (r)-3-hydroxybutanoate + h(+) => (3r)-hydroxybutanoate dimer + h2o
2 (R)-3-hydroxybutanoate + H(+) => (3R)-hydroxybutanoate dimer + H2O
2 (r)-3-hydroxybutanoate + h(+) => (3r)-hydroxybutanoate dimer + h2o