Vitamin K is a fat-soluble vitamin that is stable in air and moisture but decomposes in sunlight. It is a polycyclic aromatic ketone, based on 2-methyl-1,4-naphthoquinone, with a 3-phytyl substituent. It is found naturally in a wide variety of green plants, particularly in leaves, since it functions as an electron acceptor during photosynthesis, forming part of the electron transport chain of photosystem I.
Phytomenadione
Epoetin beta
Phytosterol
Etiocholanolone
Estradiol hexahydrobenzoate
Lipoic acid
Polyestriol phosphate
Psymberin