@article {6662,
	title = {Unexpected regioselectivity in the synthesis of pyranonaphthoquinone via the diels-alder reaction},
	journal = {Organic Letters},
	year = {2009},
	pages = {4628-4631},
	doi = {10.1021/ol901902v},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/19757828},
	author = {Yi Cui and Hao Jiang and Zhengtao Li and Na Wu and Zhen Yang and Junmin Quan}
}
