The investigation of leaves/stems and flowers of Tulipa turkestanica afford
ed, in addition to 6-tuliposide A, 1-tuliposide A, tuliposide D and the lac
tonized aglycones tulipalin A and (-)-tulipalin B, two new tuliposides. The
structure of the new tuliposides were determined by spectral methods to be
1-(4-hydroxy-2-methylenebutanoate)-6-((S)-3,4-dihydroxy-2-methylenebutanoa
te)-beta-D-glucopyranose (tuliposide F) and 6-((S)-3,4-dihydroxy-2-methylen
ebutanoate)-D-glucopyranose (6-tuliposide B), the latter being a new acyl d
erivative of the known 1-tuliposide B. The investigation of Tulipa sylvestr
is gave 6-tuliposide A and B, tuliposide D and tulipalin A and B. The possi
ble biosynthesis of the isolated compounds is briefly discussed. (C) 1999 E
lsevier Science Ltd. All rights reserved.