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bufagin
Bufagin is a toxic steroid C24H34O5〔ChemicalBook: (bufagin )〕 obtained from toad's milk, the poisonous secretion of a skin gland on the back of the neck of a large toad (''Rhinella marina'', synonym ''Bufo marinus'', the Cane Toad). The toad produces this secretion when it is injured, scared or provoked. Bufagin resembles chemical substances from digitalis in physiological activity and chemical structure. ''Bufagin'' also refers to any of several similar substances found as components of the mixture bufotoxin in secretions of other toads, as well as plants and mushrooms. ==Chemistry==
Bufagin and bufagins are bufadienolide derivatives. This means they are steroids with a pyran- (delta-)lactone ring attached to ring D (the five-membered one). The difference to digitalis compounds is that the latter have a furan- (gamma-)lactone ring that has one carbon atom and one double bond less.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「bufagin」の詳細全文を読む
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