Inophyllum B ((+)-Inophyllum B) is a potent HIV Reverse Transcriptase inhibitor with an IC50 value of 38 nM. Inophyllum B inhibits HIV-1 (IC50=1.4 μM) in vitro cell culture. Inophyllum B can be isolated from the acetone extract of the giant African snail, Achatina fulica[1].
[1] Patil AD, et al. The inophyllums, novel inhibitors of HIV-1 reverse transcriptase isolated from the Malaysian tree, Calophyllum inophyllum Linn. J Med Chem. 1993 Dec 24;36(26):4131-8. DOI:10.1021/jm00078a001