J. Penelle et al., 5 ',6 '-dehydroguiachrysine and 5 ',6 '-dehydroguiaflavine, two curarizingquaternary indole alkaloids from the stem bark of Strychnos guianensis, PHYTOCHEM, 58(4), 2001, pp. 619-626
Two new quaternary indole alkaloids 5',6'-dehydroguiachrysine (1) and 5',6'
-dehydroguiaflavine (2) were isolated from Strychnos guianensis stem bark.
Their structures were determined by analysis of spectral data. Their inhibi
tory effects on neuromuscular transmission are also reported and compared t
o that of other quaternary alkaloids. (C) 2001 Elsevier Science Ltd. All ri
ghts reserved.