@article{article639333ee,
title   = {Bromination of 1,7-dimethoxy-3-methylxanthone with N-bromosuccinimide},
author = {Goissis, Gilberto},
year = {1982},
doi = {10.1016/s0040-4039(00)85722-6},
journal   = {Tetrahedron Letters}
}