Question: What is the chemical formula for the acid used in boracic lint? 
Sentence (from "Gallic acid"): Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid, a type of phenolic acid, found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants.
Relevant evidence: No