A Mew Acylated Apigenin 4'–O–β–D–glucoside from the Leaves of Lycopodium clavatum L - Ansari, Faizur Rahman; Ansari, Wajid Husain; Rahman, Wasiur; Seligmann, O.; Chari, V. M.; Wagner, H.; österdahl, B. G. (Planta Medica, 1979)