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pubmed-article:17935987pubmed:abstractText3-O-3'(or 2')-Methylsuccinyl-betulinic acid (MSB) derivatives were separated by using recycle HPLC. The structures of four isomers were assigned by NMR and asymmetric synthesis. 3-O-3'S-Methylsuccinyl-betulinic acid (3'S-MSB, 4) exhibited potent anti-HIV activity with an EC(50) value of 0.0087microM and a TI value of 6.3x10(3), which is comparable to the data for bevirimat (DSB, PA-457), a current clinical trials drug that was also derived from betulinic acid. The anti-HIV potency of 4 was slightly better than that of AZT.lld:pubmed
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pubmed-article:17935987pubmed:articleTitleAnti-AIDS agents 73: structure-activity relationship study and asymmetric synthesis of 3-O-monomethylsuccinyl-betulinic acid derivatives.lld:pubmed
pubmed-article:17935987pubmed:affiliationNatural Products Research Laboratories, School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.lld:pubmed
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