This molecular diversity extends pyrimidine structures beyond traditional linear or bicyclic forms, creating polyheterocycles with enhanced 3D structural diversity. These novel frameworks overcome the ...

State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences (CAS), Shanghai 200032, China State Key Laboratory of Chemical Biology, ...

Hydrogen atoms can be selectively extracted from symmetrical molecules using a catalyst readily derived from Cinchona alkaloids, researchers in the UK have shown. The researchers went on to form ...

Alkaloids are important bioactive molecules throughout the natural world, and in many animals they serve as a source of chemical defense against predation. Dendrobatid poison frogs bioaccumulate ...

Melatonin is an endocrine hormone with a monoamine alkaloid structure, produced from the amino acid tryptophan. Melatonin is generated by the pineal gland in mammals. Melatonin is involved in ...