A compound represented by Formula 1 or pharmaceutically acceptable salt thereof: wherein R 2 , R 3 and R 4 are each independently alkyl having 1 to 8 carbon atoms, R 5 is any one selected from the group consisting of hydrogen; halogen; alkyl having 1 to 8 carbon atoms; -Si(R 6 ) 3 ; and aryl having 6 to 18 carbon atoms, wherein the alkyl having 1 to 8 carbon atoms or aryl having 6 to 18 carbon atoms of R 5 is each independently substituted with alkyl having 1 to 8 carbon atoms or aryl having 6 to 18 carbon atoms, or not substituted, R 6 is any one selected from the group consisting of hydrogen, alkyl having 1 to 8 carbon atoms and aryl having 6 to 18 carbon atoms, R 1 is any one selected from the group consisting of hydrogen; sulfonyl; carbonyl; alkyl having 1 to 12 carbon atoms; and aryl having 6 to 18 carbon atoms, wherein the sulfonyl or carbonyl of R 1 is each independently substituted or not substituted with one or more substituents selected from the group consisting of alkyl having 1 to 8 carbon atoms, which is substituted or not substituted with a halogen; and aryl having 6 to 18 carbon atoms, which is substituted or not substituted with alkyl having 1 to 8 carbon atoms or halogen, and the alkyl having 1 to 12 carbon atoms or aryl having 6 to 18 carbon atoms of R 1 is each independently substituted or not substituted with one or more selected from the group consisting of halogen; -NO 2 ; alkyl having 1 to 8 carbon atoms, which is substituted or not substituted with halogen; alkoxy having 1 to 8 carbon atoms, which is substituted or not substituted with halogen; and aryl having 6 to 18 carbon atoms, which is substituted or not substituted with alkyl having 1 to 8 carbon atoms or halogen, L is a linker represented by Formula 2 or 3 below, in Formula 2, Q is S, and P is -NH-, and in Formula 3, Z is -NH-. wherein R 2 , R 3 and R 4 are each independently alkyl having 1 to 8 carbon atoms, R 5 is any one selected from the group consisting of hydrogen; halogen; alkyl having 1 to 8 carbon atoms; -Si(R 6 ) 3 ; and aryl having 6 to 18 carbon atoms, wherein the alkyl having 1 to 8 carbon atoms or aryl having 6 to 18 carbon atoms of R 5 is each independently substituted with alkyl having 1 to 8 carbon atoms or aryl having 6 to 18 carbon atoms, or not substituted, R 6 is any one selected from the group consisting of hydrogen, alkyl having 1 to 8 carbon atoms and aryl having 6 to 18 carbon atoms, R 1 is any one selected from the group consisting of hydrogen; sulfonyl; carbonyl; alkyl having 1 to 12 carbon atoms; and aryl having 6 to 18 carbon atoms, wherein the sulfonyl or carbonyl of R 1 is each independently substituted or not substituted with one or more substituents selected from the group consisting of alkyl having 1 to 8 carbon atoms, which is substituted or not substituted with a halogen; and aryl having 6 to 18 carbon atoms, which is substituted or not substituted with alkyl having 1 to 8 carbon atoms or halogen, and the alkyl having 1 to 12 carbon atoms or aryl having 6 to 18 carbon atoms of R 1 is each independently substituted or not substituted with one or more selected from the group consisting of halogen; -NO 2 ; alkyl having 1 to 8 carbon atoms, which is substituted or not substituted with halogen; alkoxy having 1 to 8 carbon atoms, which is substituted or not substituted with halogen; and aryl having 6 to 18 carbon atoms, which is substituted or not substituted with alkyl having 1 to 8 carbon atoms or halogen, L is a linker represented by Formula 2 or 3 below, in Formula 2, Q is S, and P is -NH-, and in Formula 3, Z is -NH-. <EOS>