T. Miyase et al., BETONICOSIDES A-D AND BETONICOLIDE, DITERPENOIDS FROM THE ROOTS OF STACHYS OFFICINALIS, Chemical and Pharmaceutical Bulletin, 44(8), 1996, pp. 1610-1613
Four new diterpene glycosides, betonicosides A-D and a nem diterpene,
betonicolide, were isolated from the roots of Stachys officinalis. The
structures of these compounds were established on the basis of spectr
oscopic and chemical evidence.