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<http://webisa.webdatacommons.org/379846782>	<http://www.w3.org/ns/prov#value>	"Patent US4140713 - Phenylethanolamine therapeutic agents - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsCompounds of the general formula: ##STR1## and non-toxic physiologically acceptable salts thereof, in which R1 is a halogen atom or a group NR2 R3 ; R2 and R3, which may be the same or different, are hydrogen or (C1 -C6) straight or br" .