4'-Substituted-4,5',8-trialkylpsoralens

4,5-Benzospiro(2,4)-heptane (and hepta-4,6-diene)-1-carboxylic a

4,5-Dichloro-3-organo-1,2-methylenedioxy-benzene arthropodicide

4-(2-Aminoethyl)-7-hydroxy-2-methyl-2,3-dihydrobenzofurans

4-(N-(3',4'-Methylenedioxybenzylidene)-aminomethyl)cyclohex ane-

4-Acylaminobenzopyrans useful as anti-hypertensive agents

4-Amino-4-phenylcyclohexanone ketal compositions and process of

4-Haloalkylamino substituted chromanol useful as antihypertensiv

4-Hydroxy-2-pyrone derivatives having antihyperlipaemic activity

4-Hydroxy-3-nitro (cyano) coumarins

4-Hydroxycoumarin compounds useful as anticoagulant rodenticides

4-Oxo-4H-benzopyrans as animal growth promotants

4-Oxo-PGI.sub.2 compounds, their use in inhibition of thrombii a

4-Spectinomycylamine and salts thereof