Venuloxanthone, a new pyranoxanthone from the stem bark of Calophyllum venulosum.
نویسندگان
چکیده
A new pyranoxanthone, venuloxanthone (1), was isolated from the stem bark of Calophyllum venulosum, together with three other xanthones, tovopyrifolin C (2), ananixanthone (3) and caloxanthone I (4), along with two common triterpenes, friedelin (5) and lupeol (6). The structures of these compounds were identified using several spectroscopic analyses which are NMR, GCMS and FTIR experiments.
منابع مشابه
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
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 NMR.
متن کاملSoulamarin, a new coumarin from stem bark of Calophyllum soulattri.
The extracts of the stem bark of Calophyllum soulattri gave a new pyranocoumarin, soulamarin (1), together with five other xanthones caloxanthone B (2), caloxanthone C (3), macluraxanthone (4), trapezifolixanthone (5) and brasixanthone B (6) one common triterpene, friedelin (7), and the steroidal triterpene stigmasterol (8). The structures of these compounds were established based on spectral e...
متن کاملXanthones from roots of Calophyllum thwaitesii and their bioactivity.
Extracts from three Calophyllum species endemic to Sri Lanka were tested for antifungal and antioxidant activities. Of them, only the root methanol extract of Calophyllum thwaitesii showed activity, and the active extract on activity guided fractionation yielded four antifungal active and three inactive xanthones. Antifungal active xanthones were identified as 1,6-dihydroxy-5-methoxyxanthone, 1...
متن کاملmolbank Short Note 5,9,11-Trihydroxy-2,2-dimethyl-10-(3′-methyl-2′- butenyl)-3-(2”-methyl-3”-butenyl)pyrano[2,3- a]xanthen-12(2H)-one from the Stem Bark of Calophyllum pseudomole
5,9,11-Trihydroxy-2,2-dimethyl-10-(3′-methyl-2′-butenyl)-3-(2”-methyl-3”-butenyl)pyrano[2,3-a]xanthen-12(2H)-one (1) was isolated from the stem bark of Calophyllum pseudomole. The structure of 1 was established by spectroscopic analysis which included UV, IR, HRESIMS and NMR experiments.
متن کاملA new coumarin from Calophyllum hosei.
A new coumarin, hoseimarin (1), together with four other xanthones, trapezifolizanthone (2), osajaxanthone (3), β-mangostin (4) and caloxanthone A (5), were isolated from the stem bark of Calophyllum hosei. The structures of these compounds were established by using spectroscopic analysis which included (1)H NMR, (13)C NMR, COSY, DEPT, HMQC and HMBC experiments.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of Asian natural products research
دوره 17 11 شماره
صفحات -
تاریخ انتشار 2015