1. A method of correcting an immune response in a mammal, comprising administering to the mammal a therapeutically effective amount of a compound: a) Formula I: or a pharmaceutically acceptable salt thereof, in which: X is O or S； R is straight or branched chain C 1-6 alkyl, if necessary substituted with one or more —NH or —NH — C (NH NH) NH； Y is a bond or carbonyl； Z is a bond or carbonyl； R is hydrogen or straight or branched C — Calkyl, optionally substituted with one or more —NH or —NH -C (= NH) NH； or R is t-XR； R is methylene, or wherein methylene is substituted with straight or branched chain C 1-6 alkyl, wherein straight or branched chain C 1-6 alkyl may be substituted with one or more -NH or -NH-C (= NH) NH； n = 2 -10； and m = 1 or 2； b) Formula II: or a pharmaceutically acceptable salt thereof, in which: X is O or S； Y is O or S； R is H or -C (= O) -A, where A is straight or branched C -Calkyl, optionally substituted with one or more -NH, -N (CH) or -NH-C (= NH) NH； R is straight or branched C-Calkyl, optionally substituted with one or more -NH, -N ( CH) or —NH — C (═NH) NH； R is straight or branched C — C alkyl, optionally substituted with one or more —NH, —N (CH) or —NH — C (= NH) NH； and R is H, -B or -C (= O) -OB, where B is straight or branched C-C1-6 alkyl； c) Formulas III: or a pharmaceutically acceptable salt thereof, in which: each A independently is —C = O, - C = S or CH； each D independently is O or S； each R is independently hydrogen, C1-6alkyl, alkoxy, halogen or halogenated； each R is independently hydrogen, C1-6alkyl, alkoxy, halogen or haloalkyl； each R is independently denotes water1. Способ коррекции иммунного ответа у млекопитающего, включающий введение млекопитающему терапевтически эффективного количества соединения:a) Формулы I:или его фармацевтически приемлемой соли,в которой:X обозначает O или S；Rобозначает C-Cалкил с прямой или разветвленной цепью, в случае необходимости замещенный одним или более -NHили -NH-C(=NH)NH；Y обозначает с
