The molecule consists of two benzene rings linked by a thioether bridge -CH2-S-CH2-.

On one benzene ring, at the meta position relative to the linker attachment, there is a single side chain with the connectivity -C(OH)=N-NH2: the ring carbon is single-bonded to a carbon that bears a hydroxyl group (-OH) and is double-bonded to a nitrogen; that nitrogen is single-bonded to a terminal amino nitrogen (-NH2).