A New Cycloartanol Sulfate from the Green Alga Tuemoya Sp.: An Inhibitor of VZV Protease

Abstract As part of a search for novel inhibitors of Herpes Zoster protease, the MeOH extract of the green alga Tuemoya sp. was shown to be active. Bioassay-guided fractionation of the extract yielded a previously reported cycloartane-3,28-disulfate-23-ol plus a novel compound that was identified as cycloart-24-en-23-one-28-sulfate-3-ol (1). These compounds demonstrated activity against both VZV and CMV protease in the 4–7 μM range.