5,9,11-Trihydroxy-2,2-dimethyl-3-(2-methylbut-3-en-2-yl)pyrano[2,3-a]xanthen-12(2H)-one from the Stem Bark of Calophyllum tetrapterum Miq

• Main Authors: Tjahjandarie, Tjitjik Srie, Saputri, Ratih Dewi, Tanjung, Mulyadi
• Format: Article PeerReviewed
• Language: English; English; English
• Published: MDPI AG, Basel, Switzerland 2017
• Subjects: QD241-441 Organic chemistry
• Online Access: http://repository.unair.ac.id/63049/1/Cover.pdf; http://repository.unair.ac.id/63049/2/Bukti%20C19.%205%2C9%2C11-Trihydroxy-2%2C2-dimethyl-3-%282-methylbut-.........pdf; http://repository.unair.ac.id/63049/3/Bukti%20C19%20Peer%20reviewer%20dan%20validasi%20Kadep.pdf; http://repository.unair.ac.id/63049/; http://www.mdpi.com
• Institution: Universitas Airlangga

A new pyranoxanthone namely 5,9,11-trihydroxy-2,2-dimethyl-3-(2-methylbut-3-en-2-yl) pyrano[2,3-a]xanthen-12(2H)-one (1) was isolated from the stem bark of Calophyllum tetrapterum Miq. The structure of compound 1 was determined by means of spectroscopic methods including UV, IR,HRESIMS, 1D and 2D NM...