Tangeretin, a flavonoid from citrus fruit peels, has been proven to play an important role in anti-inflammatory responses and neuroprotective effects in several disease models, and was also selected as a Notch-1 inhibitor.

Somatostatin-28 (1-12) is a somatostatin fragment which is monitored in brain tissue to track processing of somatostatin.

Syringopicroside is a natural product.