The invention relates to compounds of the formula
in which:
A is a divalent radical selected from:
A1) —O—CO—
A2) —CH2—O—CO—
A3) —O—CH2—CO—
A4) —O—CH2—CH2—
A5) —N(R1)—CO—
A6) —N(R1)—CO—CO—
A7) —N(R1)—CH2—CH2—
A8) —O—CH2—
in which:
R1 is a hydrogen or a (C1-C4)-alkyl; and
Am is a nitrogen-containing heterocycle.
本发明涉及以下式的化合物:其中:A是从以下中选择的二价基团:A1)—O—CO—A2)—
CH2—O—CO—A3)—O— —CO—A4)—O— — —A5)—N(R1)—CO—A6)—N(R1)—CO—CO—A7)—N(R1)— — —A8)—O— —其中:R1是氢或(C1-C4)-烷基;而Am是含氮杂环。