Oxybuprocaine
Oxybuprocaine is a benzoate ester in which 4-amino-3-butoxybenzoic acid and 2-(diethylamino)ethanol have combined to form the ester bond; an ester-based local anaesthetic (ester "caine") used especially in ophthalmology and otolaryngology. It has a role as a local anaesthetic, a topical anaesthetic and a drug allergen. It is a benzoate ester, a tertiary amino compound, a substituted aniline and an amino acid ester. It is functionally related to a 2-diethylaminoethanol.