Untersuchungen über Flechtenstoffe, LXXVIII. Mitteil.: Über Psoromsäure (II. Mitteil.)

The Chemistry of the Diaryl Ethers.

“…For the determination of structures in this class of compounds the various methylol, formyl, and methylol ether groups are reduced to methyl groups (10,14). The hydrogenated products are then investigated like the depsidones of the first type (9).…”