6 Αποτελέσματα
Sixteen diterpenoids (1-16) including 10 new ones, pierisjaponins A-J (1-10), were isolated and identified from Pieris japonica, and their structures were classified into eight diverse carbon skeletons. Pierisjaponins A (1) and B (2) represent the first 1,5-seco-grayanane diterpenoid glucosides and
A total of fifteen grayanane diterpenoid glucosides including eight undescribed ones, pierisjaponosides A-H, were isolated from the leaves of Pieris japonica (Thunb.) D. Don ex G. Don (Ericaceae). Their structures were established by extensive spectros copic techniques including HRESIMS and NMR, as
By the means of chromatographic methods and spectroscopic evidences, 7 diterpenoids were isolated and identified from the roots of Pieris formosa. These known compounds are elucidated as secorhodomollolide C(1), pierisoid B (2), secorhodomollolide B (3), secorhodomollolide A (4), pierisformotoxin G
In our on-going study to investigate components with analgesic activity, eight new grayanane diterpenoids, epoxypieristoxins A-H (1-8), along with one known compound (9) were isolated from the roots of Pieris formosa. Their structures with absolute configurations were characterized by a series of
Seven new diterpenoids, including four ent-kaurane-type pierisentkaurans B-E (1-4), one 4,5-seco- ent-kaurane-type pierisentkauran F (5), two leucothane-type 3β,7α,14β-trihydroxy-leucoth-10(20),15-dien-5-one (6) and 10α,16α-dihydroxy-leucoth-5-one (7), along with three known diterpenoids
Pierisketolide A (1) and pierisketones B and C (2 and 3), three diterpenes with an unusual A-homo-B-nor-ent-kaurane carbon skeleton, were isolated from the roots of Pieris formosa. Their structures were characterized by a series of spectroscopic methods, X-ray diffraction, and electronic circular