Calotetrapterins A-C, three new pyranoxanthones and their cytotoxicity from the stem bark of Calophyllum tetrapterum Miq

• Main Authors: Mulyadi Tanjung, Tjitjik Srie Tjahjandarie, Ratih Dewi Saputri, Baharrani Dwi Kurni, Muhammad Faisal Rachman, Yana Maolana Syah
• Format: Article PeerReviewed
• Language: English; English; English; English
• Published: Taylor & Francis 2019
• Subjects: Q Science (General); QD Chemistry
• Online Access: http://repository.unair.ac.id/94747/1/C02%20Abstract.pdf; http://repository.unair.ac.id/94747/2/C02%20Fulltext_Calotetrapterins%20A-C%2C%20three%20new%20pyranoxanthones%20and%20their%20cytotoxicity.pdf; http://repository.unair.ac.id/94747/3/C02%20Validasi_Q2%282%29_Calotetrapterins%20A-C%2C%20three%20new%20pyranoxanthones%20and%20their%20cytotoxicity.pdf; http://repository.unair.ac.id/94747/4/C02%20%28Similarity%29.pdf; http://repository.unair.ac.id/94747/; https://www.tandfonline.com/doi/full/10.1080/14786419.2019.1634714?src=recsys; https://doi.org/10.1080/14786419.2019.1634714

Three new pyranoxanthones, calotetrapterins A-C (1-3) were isolated from the stem bark of Calophyllum tetrapterum Miq along with three known xanthones, a-mangostin (4), garciniafuran (5), and pyranojacareubin (6). All structures were elucidated based on their IR, UV, HRESIMS, 1 D ( 1 H, 13 C) and 2...