< Topic >In the rumen of the ruminantia animal it cannot be disassembled, after being sent to the intestine, high it can absorb the substance, with the intestine and it offers the derivative of the ricin of the form which can be utilized organism.SolutionsBeing the composition in order to supply the ricin source which is protected with the rumen in the feed of the ruminantia animal, including the imine derivative of the ricin which possesses, the formula of structure 1 of the effective quantity, as a non poisonous carrier, and a feed compensation the composition which becomes.< Conversion 1 > < Selective figure >It is not【課題】反芻動物の第一胃では分解されず、腸へ送られた後の物質を、腸で高吸収できかつ生体的に利用できる形態のリシンの誘導体を提供する。【解決手段】第一胃で保護されるリシン源を反芻動物の餌に補うための組成物であって、非毒性のキャリア、及び餌補完として効果的な量の、構造1の式を有するリシンのイミン誘導体を含んで成る組成物。【化1】【選択図】なし