7,8-Dimethoxycoumarin is a natural product isolated from Artemisia caruifolia and Wikstroemia indica.

Homocystine is the double-bonded form of homocysteine but it occurs only transiently before being converted to the harmless cystathionine via a vitamin B6-dependent enzyme. Homocystine and homocysteine-cysteine mixed disulfide account for >98% of total homocysteine in plasma from healthy individuals.

Used as dye intermediates.