:Caffeic aldehyde

{{notability|date=September 2017}}

{{chembox

| ImageFile = Caffeic aldehyde.svg

| PIN = (2E)-3-(3,4-Dihydroxyphenyl)prop-2-enal

| OtherNames = Caffeoyl aldehyde
3,4-Dihydroxycinnamaldehyde
Caffeyl aldehyde
cis-Caffeic aldehyde
trans-Caffeic aldehyde
3-(3,4-Dihydroxyphenyl)acrylaldehyde

| Section1 = {{Chembox Identifiers

| ChemSpiderID = 391335

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 141632-15-7

| CASNo1_Ref = {{cascite|correct|CAS}}

| CASNo1 = 68149-78-0

| CASNo1_Comment = (non-specific)

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 2A5UNB3LNK

| KEGG = C10945

| PubChem = 5281871

| SMILES = C1=CC(=C(C=C1C=CC=O)O)O

}}

| Section2 = {{Chembox Properties

| C=9

| H=8

| O=3

}}

}}

Caffeic aldehyde is a phenolic aldehyde contained in the seeds of Phytolacca americana (American pokeweed).{{Cite journal | last1 = Woo | first1 = Won-Sick | last2 = Kang | first2 = Sam-Sik | date = 1979 | title = A New Phenolic Aldehyde from the Seeds of Phytolacca americana | journal = Korean Journal of Pharmacognosy | volume =10 | issue = 2 | pages = 83–84 }} It is present in various parts of a large number of plants, such as the seeds of Phytolacca americana.{{Cite journal |last1=Sick Woo |first1=Won |last2=Sik Kang |first2=Sam |last3=Seligmann |first3=Otto |last4=Mohan Chari |first4=V. |last5=Wagner |first5=Hildebert |date=January 1980 |title=The structure of new lignans from the seeds of phytolacca americana |url=http://dx.doi.org/10.1016/s0040-4039(00)92876-4 |journal=Tetrahedron Letters |volume=21 |issue=44 |pages=4255–4258 |doi=10.1016/s0040-4039(00)92876-4 |issn=0040-4039|url-access=subscription }}