The present invention provides a liquid crystal alignment agent capable of preventing a decrease in voltage holding ratio, a liquid crystal display containing such a liquid crystal alignment agent, and a method for manufacturing such a liquid crystal display. These novel artemisinin analogs and artemisinin dimers have the following structure . The damping weight is attached to free ends of the arms. The analysis classifies fields and classes as either mutable or immutable. , to treat, prevent andor inhibit cancers or cancer cell growth, such as hormone dependent or hormone independent tumors or cancers or cancer cells. According to how many times the photomask is used, a photomask having an opaque pattern made of metal and a photomask having an opaque pattern made of a resist film are properly used, and thereby an exposure treatment is performed.