Het in de beschrijving genoemde Amerikaanse octrooi 3,652,589 (verder: US 589) houdt onder meer het volgende in (onderstreping toegevoegd door rechtbank):
Analgesic drugs are well known. Highly effective analgesic compounds are derived from morphium, such
as morphine and other morphine alkaloids. However, it is weIl known, that morphine as well as other morphium
alkaloids produce a number of serious side-effects. More particularly they possess a high degree of tolerance and
drug dependence. For this reason numerous attempts have been made to produce analgesic drugs which are
substantially free of these side-effects. However, none of these attempts met with complete success.(…)
It is now an object of the present invention to provide valuable therapeutically useful cycloalkanol-sub-
stituted phenol ethers with a basic group in the cycloalkyl ring and with an alkoxy group in m-position to said
cycloalkyl ring, which compounds are substantially free of the disadvantages of the known, above-mentioned compounds of similar structure. A further object of the present invention is to provide pharmaceutical compositions containing, as essential active drug, such phenol ethers.(…)
The compounds according to the present invention have also proven to be of considerable therapeutic value when used in combination with other therapeutically active agents whereby frequently a synergistic effect is observed. Especially valuable combinations are those with other analgesics such as with acetylsalicylic acid, phenacetin, or the like; with other antiphlogistic and antiinflammatory agents, such as with phenyl butazone, or the like; with analeptics such as with caffeine and amphetamine, or the like; with antihistaminic agents, such as with pyribenz-amine, diphenylhydramine salicylate, chlorphenirimine maleate, and others, with spasmolytic agents, such as the methosulfate of (1-methyl piperidyl-2)-methyl benzilate, atropine sulfate, or the like; with muscle relaxants, such as with mephenesin, phenaglycodol, or the like; with sedative agents, such as barbituric acid derivatives, for instance, phenobarbitol, with chlorpromazine or the like. The following example illustrates the composition of such combination preparations without, however, limiting the same thereto.
25 mg. of the hydrochloride of racemic l(e)-(m-methoxy
30 mg. of pentobarbital sodium,