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|Section2= |Section3= }} Leucocyanidin is a colorless chemical compound related to leucoanthocyanidins. Leucoyanidin can be found in ''Aesculus hippocastanum'' (Horse chestnut), ''Anacardium occidentale'' (Cashew, acajou), ''Arachis hypogaea'' (Earth Nut), ''Areca catechu'' (Areca nut), ''Asimina triloba'' (American custardapple), ''Cerasus vulgaris'' (Cherry), ''Cinnamomum camphora'' (Camphor), ''Erythroxylon coca'' (coca), ''Gleditsia triacanthos'' (Honey locust), ''Hamamelis virginiana'' (American Witch Hazel), ''Hippophae rhamnoides'' (Hippophae berry Sanddorn), ''Hordeum vulgare'' (Barley), ''Humulus lupulus'' (bine), ''Hypericum perforatum'' (perikon Amber), ''Laurus nobilis'', ''Magnolia denudata'' (Hsin-I Yulan-Magnolie), ''Malva silvestris'' (Blue mallow), ''Musa acuminata × balbisiana'' (Banana), ''Nelumbo nucifera'' (Baladi bean), ''Pinus strobus'' (Eastern white pine), ''Prunus serotina'' ssp. serotina (black cherry), ''Psidium guajava'' (Common guava), ''Quercus alba'' (White oak), ''Quercus robur'' (Common oak), ''Rumex hymenosepalus'' (Arizona dock), ''Schinus terebinthifolius'' (Brazilian pepper tree), ''Terminalia arjuna'' (arjun), ''Terminalia catappa'' (Indian almond), ''Theobroma cacao'' (Cacao), ''Drimia maritima'' (Sea Squill), ''Vicia faba'' (bell-bean), ''Vitis vinifera'' (Common Grape Vine), ''Zea Mays'' (Corn, mais), ''Ziziphus jujuba'' (jujube, Chinese date).〔(Leucocyanidin on liberherbarum.com )〕 == Chemistry == (+)Leucocyanidin can be synthesized from (+)dihydroquercetin by sodium borohydride reduction.〔(Leucoanthocyanidins as intermediates in anthocyanidin biosynthesis in flowers of Matthiola incana R. Br. Werner Heller, Lothar Britsch, Gert Forkmann and Hans Grisebach, 1984 )〕 Molar equivalents of synthetic (2R,3S,4R or S)-leucocyanidin and (+)-catechin condense with exceptional rapidity at pH 5 under ambient conditions to give the all-trans-()- and ()-bi-() (procyanidins B3, B6) the all-trans-()- and ()-tri-() (procyanidin C2 and isomer).〔Synthesis of condensed tannins. Part 9. The condensation sequence of leucocyanidin with (+)-catechin and with the resultant procyanidins. Jan. A. Delcour, Daneel Ferreira and David G. Roux, J. Chem. Soc., Perkin Trans. 1, 1983, pages 1711-1717, 〕 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「leucocyanidin」の詳細全文を読む スポンサード リンク
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