Two New isoquinoline alkaloids from the bark of Alphonsea cylindrica King and their antioxidant activity

• Main Authors: Obaid Aldulaimi, Ahmed Kareem, Abdul Azziz, Saripah Salbiah Syed, Bakri, Yuhanis Mhd, Nafiah, Mohd Azlan, Aowda, Saadon Abdulla, Awang, Khalijah, Litaudon, Marc
• Format: Article
• Published: Elsevier 2019
• Subjects: Q Science (General); QD Chemistry
• Online Access: http://eprints.um.edu.my/20016/; https://doi.org/10.1016/j.phytol.2018.11.022
• Institution: Universiti Malaya

Two new isoquinoline alkaloids, iraqiine (1) and kareemine (2), along with five known alkaloids, muniranine (3), kinabaline (4), O-methylmoschatoline (5), atherospermidine (6) and N-methylouregidione (7), were purified from the dichloromethane crude extract of Alphonsea cylindrica bark. The structur...