| http://www.w3.org/ns/prov#value | - The invention concerns new derivatives of tetrahydro-2,3,6,7,1H,5H,11H-(1)benzopyrano(6,7,8, ij)quinolizinone in accordance with formula: ##STR1## in which R1 represents a radical having formula: ##STR2## wherein m is equal to 0 or 1, and n is equal to 0 or is a whole number from 1 to 12, provided that n is equal to 0 when m is 0, or the radical having the formula:
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