Oxaloacetic acid also known as oxosuccinic acid or oxalacetic acid is a four-carbon dicarboxylic acid appearing as an intermediate of the citric acid cycle.

Lanosterol is a tetracyclic triterpenoid which is the compound from which all steroids are derived.

H-Phe-Phe-OH is a peptide made of two phenylalanine molecules; Phenylalanine is an essential amino acid and the precursor for the amino acid tyrosine.