cis-4-Hydroxy-D-proline belongs to the class of organic compounds known as proline and derivatives. Proline and derivatives are compounds containing proline or a derivative thereof resulting from a reaction of proline at the amino group or the carboxyl group or from the replacement of any hydrogen of glycine by a heteroatom.

Methylgomisin O is a natural product.

Albiflorin and paeoniflorin has neuroprotective action against Glu toxicity.