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Wang, Jianbin; Ma, He; Fu, Hongzheng . (2018). Semisynthesis of ent -norstrobane diterpenoids as potential inhibitor for factor Xa. Bioorganic & Medicinal Chemistry Letters, (), S0960894X18304372–. doi:10.1016/j.bmcl.2018.05.036 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research