biostudies-literatureChen MKey-Area Research and Development Program of Guangdong ProvinceNational Key R&D Program of ChinaNational Key R&D Program of ChinaNational Natural Science Foundation of ChinaLocal Innovative and Research Teams Project of Guangdong Pearl River Talents Program111-118https://www.ebi.ac.uk/biostudies/studies/S-EPMC7933295biostudies-literatureUnknown11(1)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.Natural products and bioprospectingFour New Phloroglucinol-Terpene Adducts from the Leaves of Myrciaria cauliflora.PMC79332952017BT01Y036818220422017YFC17038002020B111111000481630095Wang WJYe WCChen MCao JQLi NPWu YWang LfalseFour New Phloroglucinol-Terpene Adducts from the Leaves of Myrciaria cauliflora.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.2021-01-01T00:00:00Z2021 Feb2025-04-22T08:22:33.221Z2025-04-05T22:30:35.35ZS-EPMC79332953328006010.1007/s13659-020-00288-4