Direct transformation of ergosterol to (22S,23E)-6.beta.-methoxy-3.alpha.,5-cyclo-5.alpha.-ergost-23-en-22-ol, a key intermediate for the synthesis of brassinolide
Direct transformation of ergosterol to (22S,23E)-6.beta.-methoxy-3.alpha.,5-cyclo-5.alpha.-ergost-23-en-22-ol, a key intermediate for the synthesis of brassinolide