title: Erratum: (4R)-Ethyl 4-(4-chloro-phen-yl)-2-hydr-oxy-5-oxo-2,3,4,5-tetra-hydro-pyrano[3,2-c]chromene-2-carboxyl-ate. Corrigendum.
abstract: The absolute configuration in the title of the paper by Wang, Zhang, Xu & Zhang [Acta Cryst. (2010), E66, o217] is corrected.[This corrects the article DOI: 10.1107/S1600536809051976.].
authors.affiliation: State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Xiangsheng
authors.initials: X
authors.lastname: Xu
authors.forename: Guangcun
authors.initials: G
authors.lastname: Zhang