描述
2-undecenal, also known as (E)-undec-2-enal or fema 3423, is a member of the class of compounds known as medium-chain aldehydes. Medium-chain aldehydes are an aldehyde with a chain length containing between 6 and 12 carbon atoms. Thus, 2-undecenal is considered to be a fatty aldehyde lipid molecule. 2-undecenal is practically insoluble (in water) and an extremely weak basic (essentially neutral) compound (based on its pKa). 2-undecenal can be found in fruits, which makes 2-undecenal a potential biomarker for the consumption of this food product.