Melacacidin is a chemical compound related to leucoanthocyanidins. It can be found in Acacia crassicarpa.Bioactive phenolic substances in important tree species. Part 3: Knots and stemwood of Acacia crassicarpa and A. mangium, Suvi P. Pietarinen, Stefan M. Willför, Rainer E. Sjöholm, Bjarne R. Holmbom, 2005
Melacacidin is a compound that can provoke contact allergy to Australian blackwood Acacia melanoxylon.
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