Pyrano[4,3-e]-as-triazines and corresponding 4-oxides
申请人:Sandoz, Inc.
公开号:US04285944A1
公开(公告)日:1981-08-25
This disclosure describes novel compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently represent hydrogen, halo having an atomic weight of about 19 to 36, lower alkyl, straight chain lower alkoxy, amino, nitro or trifluoromethyl, and R.sub.3 represents hydrogen or lower alkyl, and X represents ##STR2## which are useful as sleep inducers.