Histidine (abbreviated as His or H) is an alpha-amino acid. The L-isomer is one of the 22 proteinogenic amino acids i.e. the building blocks of proteins.

(R)-Naroparcil is an isomer of Naroparcil. Naroparcil, a 4-methylumbelliferyl beta-D-xyloside analog, is associated with vascular smooth muscle cell proliferation and inhibits thrombus formation in the Wessler slough model.

Ganoderenic acid K is a natural product, that can be isolated from fruiting bodies of Ganoderma lucidum.