Chemical constituents from mangrove plant Sonneratia paracaseolaris / 中草药

ABSTRACT

Objective: To study the chemical constituents of the methanol extract from the aerial parts of the mangrove plant Sonneratia paracaseolaris. Methods: The methanol extract was isolated and purified with various chromatographic methods, including silica gel, ODS, Sephadex LH-20 columns, TLC, and HPLC. The compounds were identified by their physical chemical properties and 1H-NMR and 13C-NMR data. Results: Seventeen compounds were obtained from the methanol extract of Sonneratia paracaseolaris and identified as phytol (1), stigmasta-4-ene-3,6-dione (2), stigmata-4,22-diene-3,6-dione (3), cholesterol (4), (22E)-cholesterol-5,22-diene-3β-alcohol (5), diosmetin (6), tricin (7), 5,3′,5′-trihydroxy-7,4′-dimethoxyflavone (8), 5-hydroxy- 7,4′-dimethoxyflavone (9), 5-hydroxyl-7,3′,4′-trimethoxydihydroflavone (10), vanillin (11), p-hydroxy benzaldehyde (12), salicylic acid (13), trans-p-hydroxyl ethyl cinnamate (14), 4-hydroxy-2,6-dimethoxy-benzaldehyde (15), 3,4,5-trimethoxybenzoic acid (16), and 3,3′,4-trimethoxyellagic acid (17). Conclusion: All the compounds except 4, 11, 15, and 17 are obtained from genus Sonneratia. All compounds are isolated from S. paracaseolaris for the first time.