The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 1977
Filed:
May. 10, 1976
Satoru Tanaka, Higashikurume, JA;
Hideaki Watanabe, Ushiku, JA;
Eisai Co., Ltd., Tokyo, JA;
Abstract
1,3-Benzodioxol derivatives, the new compounds, represented by the formula: ##STR1## AND THE PHARMACOLOGICALLY ACCEPTABLE ACID-ADDITION SALTS THEREOF ARE PROVIDED, WHEREIN R.sub.1 and R.sub.2 are lower alkyls or the both together may form a divalent alkylene, R.sub.3 is a lower alkyl, phenyl, halogen-substituted phenyl or benzhydryl group, n is an integer of 2 or 3, and X stands for carbonyl (CO) or methylene (CH.sub.2) bridge. The compounds in which X stands for the methylene exhibit durable anti-histamic activity with low toxicity, and are useful for therapeutic purposes, while the compounds in which X stands for the carbonyl bridge are easily convertible by reduction into the former compounds.