sentences:  Alpha-Cyano-4-hydroxycinnamic acid
  
  α-Cyano-4-hydroxycinnamic acid, also written as "alpha"-cyano-4-hydroxycinnamic acid and abbreviated CHCA or HCCA, is a cinnamic acid derivative and is a member of the phenylpropanoid family.α-Cyano-4-hydroxycinnamic acid is used as a matrix for peptides and nucleotides in MALDI mass spectrometry analyses.