Anserine is a dipeptide containing β-alanine and histidine, which can be found in the skeletal muscle and brain of mammals and birds.?

Octadecanal is present in the thigh and chest muscles.

Cytosine is a pyrimidine base that is a fundamental unit of nucleic acids. The deamination of cytosine alone is apparent and the nucleotide of cytosine is the prime mutagenic nucleotide in leukaemia and cancer.