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Johnson TA, Morgan MV, Aratow NA, Estee SA, Sashidhara KV, Loveridge ST, Segraves NL, Crews P.Johnson TA, et al.J Nat Prod. 2010 Mar 26;73(3):359-64. doi: 10.1021/np900565a.J Nat Prod. 2010.PMID: 20030364Free PMC article.