Abstract: A method for treating an autoimmune neurological disease and/or a neurodegenerative disease is provided. The method includes administering an effective amount of at least one compound having Formula (I), Formula (II) or Formula (III), or its geometric isomer, enantiomer or diastereomer to a subject in need thereof: wherein is a single or double bond, X is NCH3 or CH2, Y is null, O or N, Z is O or N, R1 is H, OH, and R2 is null, H, C1-C8 alkyl, —(C?O)-alkyl, —(C?O)-aryl, —(C?O)-alkyl-aryl, —(C?O)-heteroaryl, cycloalkyl or heterocycloalkyl, which optionally substituted by one or more of —OH, —NO2, —NH2, —NR3R4, carbonyl, alkoxyl, alkyl or —OCF3, wherein R3 and R4 independently are H, alkyl, O2CH3, —(C?O)—CH3 or (C?O)—NH2.

Abstract: A method for treating an autoimmune neurological disease and/or a neurodegenerative disease is provided. The method includes administering an effective amount of at least one compound having Formula (I), Formula (II) or Formula (III), or its geometric isomer, enantiomer or diastereomer to a subject in need thereof: wherein is a single or double bond, X is NCH3 or CH2, Y is null, O or N, Z is O or N, R1 is H, OH, and R2 is null, H, C1-C8 alkyl, —(C?O)-alkyl, —(C?O)-aryl, —(C?O)-alkyl-aryl, —(C?O)-heteroaryl, cycloalkyl or heterocycloalkyl, which optionally substituted by one or more of —OH, —NO2, —NH2, —NR3R4, carbonyl, alkoxyl, alkyl or —OCF3, wherein R3 and R4 independently are H, alkyl, —SO2CH3, —(C?O)—CH3 or —(C?O)—NH2.

Abstract: A method for treating an autoimmune neurological disease and/or a neurodegenerative disease is provided. The method includes administering an effective amount of at least one compound having Formula (I), Formula (II) or Formula (III), or its geometric isomer, enantiomer or diastereomer to a subject in need thereof: wherein is a single or double bond, X is NCH3 or CH2, Y is null, O or N, R1 is H, OH, and R2 is null, H, C1-C8 alkyl, —(C?O)-alkyl, —(C?O)-aryl, —(C?O)-alkyl-aryl, —(C?O)-heteroaryl, cycloalkyl or heterocycloalkyl, which optionally substituted by one or more of —OH, —NO2, —NH2, —NR3R4, carbonyl, alkoxyl, alkyl or —OCF3, wherein R3 and R4 independently are H, alkyl, —SO2CH3, —(C?O)—CH3 or —(C?O)—NH2.

Abstract: An herbal extract which induces immune cells to produce interferon and activates Toll-like receptors and a preparation method thereof are provided. The herbal extract is extracted from an effective amount of raw material including Glycyrrhizae Radix, Bupleuri Radix, Scutellariae Radix, Schisandrae Fructus and Paeoniae Rubra Radix. Glycyrrhizae Radix, Bupleuri Radix, Scutellariae Radix, Schisandrae Fructus and Paeoniae Rubra Radix have a weight ratio of 1-5:1-5:1-5:1-3:1-3.