Purity >90% by HPLC. Reveromycin B is an much less active analogue of reveromycin A formed by rearrangement of the 6to6 spiroketal to a 5to6 spiroketal. Lacking much of the biological activity of reveromycin A, the reveromycin B is a useful negative control in resolving the mode of action of this class. Purity: >90% by HPLC Solubility: Soluble in ethyl acetate, ethanol, methanol, DMF or DMSO, avoid acidic conditions. Related to: Reveromycin A, Reveromycin C, Reveromycin D