PROCESS FOR PREPARING .gamma.-BUTYROLACTONE DERIVATIVES, AND IMMUNOMODULATING COMPOSITIONS CONTAINING THE SAME AS ACTIVE INGREDIENTS
There are disclosed .gamma. -butyrolactone derivatives represented by the following formula wherein R1, R2, R3 and X each represent a group or an atom as defined in the specification; and an immunomodulating composition containing the same as an active ingredient.
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Hauptverfasser: | , , |
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Format: | Patent |
Sprache: | eng ; fre |
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Zusammenfassung: | There are disclosed .gamma. -butyrolactone derivatives represented by the following formula wherein R1, R2, R3 and X each represent a group or an atom as defined in the specification; and an immunomodulating composition containing the same as an active ingredient. |
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