Tuliposides from Tulipa sylvestris and T-turkestanica

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.