<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">synthetic indigo</topic></authority><related type="other"><topic>indigo</topic></related><related type="broader"><topic>colorant for dye and pigment</topic></related> <note xml:lang="en"><![CDATA[ Synthetic colorant made from anthranilic acid and chemically identical to natural indigo. Synthetic indigo was first produced in 1880 by Adolf von Baeyer. It has almost entirely replaced the natural dyestuff. ]]></note></mads>