Solubility of Forskolin in ethanol
Sigma gives a solubility of 200 microMole in water containing 2% ethanol.
They state:


  Forskolin is soluble in water (with 2% ethanol) up to 0.2 mM by first
  dissolving in ethanol at 5 mg/mL and doing subsequent dilutions with
  water.


The datasheet can be found here.