3,4-dihydro-2H-1-benzopyrans useful as anti-hypertensive agents

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

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549404, 549399, 549345, 549 60, 549 57, 549 51, 548525, 548454, 548336, 548305, 548236, 548226, 548200, 548195, 548191, 548188, 548184, 548183, 548141, 548136, 548135, 548134, 548130, 548129, 548128, 548127, 546269, 546169, 546159, 546156, 546146, 546143, 546141, 544407, 544406, 544405, 544335, 544334, 544333, 544322, 544298, 544283, 544238, 544219, 544217, 544212, 544180, 514444, 514443, 514422, 514414, 514407, 514406, 514397, 514377, 514376, 514374, 514370, 514369, 514365, 514361, 514337, 514314, 514313,

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047820837

ABSTRACT:
Compounds of formula (I) and pharmaceutically acceptable salts thereof: ##STR1## wherein: one of R.sub.1 and R.sub.2 is hydrogen or C.sub.1-4 alkyl and the other is C.sub.1-4 alkyl or R.sub.1 and R.sub.2 together are C.sub.2-5 -polymethylene;

REFERENCES:
patent: 4481214 (1984-11-01), Evans
patent: 4575511 (1986-03-01), Evans et al.
patent: 4677116 (1987-06-01), Evans
J. March, Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, p. 21 (1968).

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