A new depside and two new diphenyl ether compounds from the lichen Ramalina farinacea (L.) Ach

- Two new diphenyl ethers and a new depside were isolated from the lichen Ramalina farinacea.
- Their structures were established on the basis of 1D and 2D NMR spectroscopy and HR-ESI-MS.
- A possible biosynthetic route for the formation of the two new diphenyl ethers was proposed.