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Smith; Harry
Maplehurst, GB2
No. of patents:

Patent Number Title Of Patent Date Issued
4263299 Heterocyclic coumarin derivatives April 21, 1981
A compound of formula (I): ##STR1## and pharmaceutically acceptable salts thereof, wherein R is hydrogen or an alkyl group containing up to 6 carbon atoms; X is a bond or oxygen; Y is --(CH.sub.2).sub.n -- where n is 0 or an integer from 1 to 5 wherein one carbon atom not bound t
4248879 Benzopyranotriazoles February 3, 1981
Compounds of the formula (I): ##STR1## and pharmaceutically acceptable salts thereof wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which may be the same of different, represent hydrogen, halogen, nitro, lower alkyl, and lower alkoxy, or any adjacent two of R.sub.1 to R.sub.4 take

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