Provided is a glaucocalyxin A derivative, or salt thereof, as represented by the formula (I), a method for preparation of said glaucocalyxin A derivative, and a use for said glaucocalyxin A derivative in preparing pharmaceuticals for fighting autoimmune diseases and tumors, e.g. difficult-to-treat diseases such as systemic lupus erythematosus, psoriasis and triple-negative breast cancer ##STR00001##

Provided is a glaucocalyxin A derivative, or salt thereof, as represented by the formula (I), a method for preparation of said glaucocalyxin A derivative, and a use for said glaucocalyxin A derivative in preparing pharmaceuticals for fighting autoimmune diseases and tumors, e.g. difficult-to-treat diseases such as systemic lupus erythematosus, psoriasis and triple-negative breast cancer ##STR00001##

Provided is a glaucocalyxin A derivative, or salt thereof, as represented by the formula (I), a method for preparation of said glaucocalyxin A derivative, and a use for said glaucocalyxin A derivative in preparing pharmaceuticals for fighting autoimmune diseases and tumors, e.g. difficult-to-treat diseases such as systemic lupus erythematosus, psoriasis and triple-negative breast cancer

##STR00001##

Provided is a glaucocalyxin A derivative, or salt thereof, as represented by the formula (I), a method for preparation of said glaucocalyxin A derivative, and a use for said glaucocalyxin A derivative in preparing pharmaceuticals for fighting autoimmune diseases and tumors, e.g. difficult-to-treat diseases such as systemic lupus erythematosus, psoriasis and triple-negative breast cancer

##STR00001##