Cytotoxic Dihydrothiophene-Condensed Chromones from Marine-Derived Fungus Penicillium oxalicum - Sun, Yu-Lin; He, Fei; Liu, Kai-Sheng; Zhang, Xiao-Yong; Bao, Jie; Wang, Yi-Fei; Nong, Xu-Hua; Xu, Xin-Ya; Qi, Shu-Hua (Planta Medica, 2012)