Cryptochlorogenic acid is a structural isomer of chlorogenic acid; it is a cinnamate ester formed by the condensation of the carboxy group of trans-caffeic acid with the 4-hydroxy group of quinic acid. It can be isolated from several plant sources including apples, coffee, sunflowers, potatoes, and Hibiscus sabdariffa. Cryptochlorogenic acid mixed with related compounds has demonstrated potential anti-oxidant and anti-inflammatory properties and shown inhibitory activity against HBV DNA replication.