Six New 3,5-Dimethylcoumarins from <i>Chelonopsis praecox, Chelonopsis odontochila</i> and <i>Chelonopsis pseudobracteata</i>

Chang-An Geng, Zhen-Tao Deng, Qian Huang, Chun-Lei Xiang, Ji-Jun Chen

Natural Products and Bioprospecting . 2021, (6): 643 -649 . DOI: 10.1007/s13659-021-00318-9