hydroxymalonate + (E)-sinapoyl-CoA = (E)-sinapoyltartronate + CoA
hydroxymalonate + (e)-sinapoyl-coa = (e)-sinapoyltartronate + coa
"hydroxycinnamoyl-coenzyme-A:tartronate hydroxycinnamoyltransferase"
"hydroxycinnamoyl-coenzyme-a:tartronate hydroxycinnamoyltransferase"