Ritalinic acid is an inactive, major metabolite of methylphenidate, a schedule II drug in the United States commonly used as a psychostimulant drugs methylphenidate and ethylphenidate. The elimination half-life of methylphenidate is relatively short (approximately 2 hours); therefore it is also available in extended release (ER) forms. The main metabolite is ritalinic acid, and the methylphenidate metabolites are mostly excreted in urine.

1-caffeoylquinic acid was extracted from Tetrastigma hemsleyanum leafs and identified in Ixeris sonchifolia. This dietary phytochemical is found in Quince, also. In silico study revealed that 1-caffeoylquinic acid effectively binds in the RH domain of NF-κB and might be a potent inhibitor of NF-κB pathway in cure and prevention of breast cancer.