Prenylaromadendrane-type diterpenoids from the gum resin of flueck and their cytotoxic effects.

Two new prenylaromadendrane-type diterpenoids, and three known analogues, were isolated from the ethanol extract of the gum resin of Flueck. The structures of the new compounds were elucidated using 1 D and 2 D NMR spectroscopic analyses, mass spectrometric data, circular dichroism spectra, and comparison with the other compounds in the literature. One diterpenoid represents the first example of an acetoxyl-substituted prenylaromadendranoid in frankincense.

Hypseudohenrins I - K: three new polycyclic polyprenylated acylphloroglucinol derivatives from .

Three previously unidentified polycyclic polyprenylated acylphloroglucinols (PPAPs) derivatives, hypseudohenrins I-K (-), along with a known analogue hyphenrone X (), were isolated from the aerial part of . The structures of the new compounds were elucidated by NMR spectroscopy and ECD calculation. The anti-inflammatory activity of the compounds was evaluated.

Two new polycyclic polyprenylated acylphloroglucinols derivatives from .

Polycyclic polyprenylated acylphloroglucinols (PPAPs) were mainly obtained from the plants of genus of Guttiferae family, and possessed intriguing chemical structures and appealing biological activities. Two new PPAPs derivatives, hyperacmosin C () and hyperacmosin D () were isolated from . Their structures were established by NMR, HREIMS, and experimental electronic circular dichroism spectra.

Ten undescribed cembrane-type diterpenoids from the gum resin of Boswellia sacra and their biological activities.

Ten undescribed cembrane-type diterpenes boscartins AL-AU, as well as five known analogues were isolated from Boswellia sacra Flueck. The relative configurations of these boscartins were established by extensive spectroscopic analysis of NMR spectra, IR and MS. The absolute configurations of boscartin AL, boscartin AN and isoincensole oxide were unequivocally assigned by single crystal X-ray diffraction.

Hyperacmosins H-J, three new polycyclic polyprenylated acylphloroglucinol derivatives from .

Three new polycyclic polyprenylated acylphloroglucinol derivatives, hyperacmosins H-J (), with four known compounds (), were isolated from the air-dried aerial parts of . Especially, compounds and were identified as methylated polycyclic polyprenylated acylphloroglucinol derivatives (mPPAPs). Their structures were established by NMR, HRESIMS and experimental electronic circular dichroism (ECD) spectra.