ae 
i, 
v 
tj 
: 
- * 
Py TI 
: 
6 
Seeds of Rivea corymbosa (top, left) and Ipomoea violacea (bottom, left). (Right) 
Thin layer chromatogram of the alkaloidal fraction, each 25y of Rivea corym- 
bosa (1) and Ipomoea violacea (11). 
ALT 
i O.D.@.' 
