Marchantin K

3,5-[Oxy(1,4-phenylene)ethylene(3-hydroxy-1,2-phenylene)oxy(1,3-phenylene)(2-ethoxyethylene)]catechol

8-Ethoxy-7,8,19,20-tetrahydro-15,18-etheno-2,6:9,13-dimetheno-1,14-benzodioxacyclodocosin-11,12,24-triol