Steroidal Sapogenins LV

Chemical Constituents of Cocculus carolinus D. C. (Menispermaceae)

“…In a preliminary phytochemical study, Wall et al (2) indicated the presence of alkaloids in the leaves of this species. In a preliminary phytochemical study, Wall et al (2) indicated the presence of alkaloids in the leaves of this species.…”

“…The resulting solution was extracted with ether (3 X 1 2. was acidified to pH 5 with concentrated hydrochloric acid and then rebasified with concentrated ammonium hydroxide solution to pH 8.…”

Herbal Remedies of the Maritime Indians: Sterols and Triterpenes of Achillea millefolium L. (Yarrow)

“…Some early articles and various screening papers have reported sterols, triterpenes (3-5), and saponins (6, 7) present in yarrow, although at least one paper stated that the plant contained no steroids (8). Only two authors have previously attempted to determine the nature of the sterols and triterpenes present in this plant.…”

False-Positive Alkaloid Reactions

“…Many reports have discussed its sensitivity and specificity (2), false reactions (3,12), and modifications (13)(14)(15)(16)(17)(18)(19)(20). Complete elimination of these constituents cannot be accomplished through the one partition purification step required in many reported screening procedures (22)(23)(24)(25)(26). Such compounds may create difficulty, especially during alkaloid screening without sufficient partition purification steps (4).…”