umbelliferone + CoA => (E)-2,4-dihydroxycinnamoyl-CoA
umbelliferone + coa => (e)-2,4-dihydroxycinnamoyl-coa
umbelliferone + CoA => (E)-2,4-dihydroxycinnamoyl-CoA
umbelliferone + coa => (e)-2,4-dihydroxycinnamoyl-coa