"Wangqiao Chem,Guankui Long,Koji Kanehira,Mingtao Zhang,Tsuyoshi Michinobu,Ming Liu,Qichun Zhang","A Quick Method to Approach Substituted Pyreno[4,5-c:9,10-c�f]difuran and Its Analogues (O replaced by S, Se, NCH3)",,"Asian J. Org. Chem.","Wiley","Vol. 7","No. 11","pp. 2213-2217",2018,Apr.