“…A number of diterpenoids isolated from the roots of the Indian plant Coleus forskohlii and designated as coleonols (Tandon, Dhar, Ramakumar, Venkatesan, 1977;Tandon, Jauhari, Singh, Dhar, 1978;Jauhari, Katti, Tandon, Dhar, 1978;Katti, Jauhari, Tandon, 1979) have shown interesting pharmacological effects. The stereostructure of the major constituent Coleonol was assigned by X-ray crystallography (Ramakumar, Venkatesan, Tandon, Dhar, 1985) and NMR spectroscopy (Prakash, Roy, Dhar, 1986).…”