(E)-caffeate + pyruvate + H(+) => (E)-caffeoylpyruvate + H2O
(e)-caffeate + pyruvate + h(+) => (e)-caffeoylpyruvate + h2o
(E)-caffeate + pyruvate + H(+) => (E)-caffeoylpyruvate + H2O
(e)-caffeate + pyruvate + h(+) => (e)-caffeoylpyruvate + h2o