squaric acid dibutyl ester

Squaric acid dibutyl ester is a synthetic small molecule used topically as an immunomodulator for the treatment of skin conditions such as warts (verruca vulgaris), alopecia areata, and has been investigated for herpes labialis. Its mechanism of action is not fully understood but is believed to involve redirecting the local inflammatory response by inducing allergic contact dermatitis and stimulating T cells and cytokines in the skin. This immune activation helps target abnormal or infected cells at the site of application. The drug has been developed primarily as a compounded topical agent and remains investigational for most indications[1][5][6][8].

Brand names

Squarex

Other names

squaric acid dibutylesterquadratic-acid-dibutylestersquaric-acid-dibutyl-ester-solutionsquaric-acid-solutiondibutyl squarate3,4-dibutoxycyclobut-3-ene-1,2-dione3,4-dibutoxy-3-cyclobutene-1,2-dione