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Daigremontianin is a bufadienolide. Bufadienolides are steroids and cardiac glycoside aglycones (meaning that they bind with carbohydrates to form cardiac glycosides) that are similar to cardenolides, differing only in the structure of the C-17 substituent on the D ring. This chemical has been found to be toxic in experiments on mice. It is one of five bufadienolides that have been isolated from ''Kalanchoe daigremontiana''.
==Toxicity==
Crassulaceans are one of the prime sources of bufadienolide cardiac glycosides (including daigremontianin) responsible for an estimated 33% of cattle mortalities related to plant poisoning in South Africa. Crassulacean bufadienolides cause cardiac poisoning, but repeated small doses cause a condition called cotyledonosis an intoxication affecting nervous and muscular systems of small animals, particularly, sheep in the Karoo area of South Africa.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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