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Myrcauones A–D (1–4), four new phloroglucinol–terpene adducts were isolated from the leaves of Myrciaria cauliflora. Their structures with absolute configurations were elucidated by combination of spectroscopic analysis, single crystal X-ray diffraction, and electronic circular dichroism (ECD) calculations. Compound 1 was a rearranged isobutylphloroglucinol–pinene adduct featuring an unusual 2,3,4,4a,10,11-hexahydro-1H-3,11a-methanodibenzo[b,f]oxepin backbone. Compound 4 showed moderate antibacterial activity against Gram-positive bacteria including multiresistant strains. [ABSTRACT FROM AUTHOR]

Four new dammarane-type triterpene saponins, 1-4, were isolated from the aerial parts of Gynostemma pentaphyllum (Thunb.) Makino. Their structural elucidations were accomplished mainly on the basis of spectroscopic methods, such as IR, HR-TOF-MS, and NMR. Compounds 1-4 showed moderate cytotoxic activities against cancer cell lines HL-60, Colon205, and Du145 in vitro. [ABSTRACT FROM AUTHOR]

The antibacterial activities of compounds (I) and (II) are evaluated, and (I) is shown to exhibit moderate activity. [ABSTRACT FROM AUTHOR]

Isolation and structure determination of five novel triterpenes, gypensapogenins H (Ia), I (Ib), L (II), J (III), and K (IV) are reported. [ABSTRACT FROM AUTHOR]

isolation and structure determination of two novel noroleanane saponins, tubeimoside A (I) and regioisomeric tubeisomide B, and a new dammarane triterpene saponin, tubeimoside C (II), together with two known compounds [ABSTRACT FROM AUTHOR]

Four new cucurbitane-type triterpene sapogenins (I)-(IV) along with eight known compounds are isolated from acid-hydrolyzed fruits extract of the title species. [ABSTRACT FROM AUTHOR]