I bought the 4-pack liver herb tinctures talked about often in here. The kit included Gold Coin Grass, Chinese Bitters, Curcuma and Coptis. They each do something different.
That company's website is http://www.sensiblehealth.com. The 4-pack price was $86.80 US. The site said the Chinese Bitters purge/detoxify the liver, the Gold Coin Grass helps crush/soften gallstones, and the Coptis & Curcuma improve bile flow & reduce discomfort passing stones.