Abstract: The purpose of the present invention is to provide novel complexes that improve the effect of nucleic acid medicines. Provided is a complex in which a multibranched lipid(s) binds through a linker to a strand of an oligonucleotide comprising a nucleic acid medicine having suppressing activity of the target gene expression.

Abstract: The purpose of the present invention is to provide double-stranded oligonucleotides comprising the CpG oligonucleotide mentioned below, as a nucleic acid derivative having an immunostimulatory activity. An adjuvant comprising a double-stranded oligonucleotide, wherein a first strand is a CpG oligonucleotide consisting of 8 to 50 nucleotides, a second strand is an oligonucleotide consisting of 8 to 60 nucleotides and comprising a sequence capable of hybridizing with the first strand, and a lipid binds to the second strand through a linker.

Abstract: The purpose of the present invention is to provide novel complexes that improve the effect of nucleic acid medicines. Provided is a complex in which a multibranched lipid(s) binds through a linker to a strand of an oligonucleotide comprising a nucleic acid medicine having suppressing activity of the target gene expression.

Abstract: The purpose of the present invention is to provide double-stranded oligonucleotides comprising the CpG oligonucleotide mentioned below, as a nucleic acid derivative having an immunostimulatory activity. An adjuvant comprising a double-stranded oligonucleotide, wherein a first strand is a CpG oligonucleotide consisting of 8 to 50 nucleotides, a second strand is an oligonucleotide consisting of 8 to 60 nucleotides and comprising a sequence capable of hybridizing with the first strand, and a lipid binds to the second strand through a linker.

Abstract: The present invention provides a novel antimicrobial drug comprising an oxazolidinone derivative of the formula (I): or a pharmaceutically acceptable salt or solvate thereof.

Abstract: The present invention provides a novel antimicrobial drug comprising an oxazolidinone derivative of the formula (I): or a pharmaceutically acceptable salt or solvate thereof; wherein ring A is ring B is a benzene ring optionally substituted with lower alkyl; ring C is an optionally substituted six-membered heterocycle containing at least one nitrogen atom and one to three double bond(s) in the ling wherein the atom at the point of attachment to ring B is a carbon atom; ring D is an optionally substituted five-membered ring containing one or two double bond(s) in the ring; A1 and A2 are independently nitrogen or carbon; m is 0 or 1; R represents H, —NHC(?O)RA, —NHC(?S)RA, —NH-het1, —O-het1, —S-het1, —S(?O)-het1, —S(?O)2-het1, het2, —CONHRA, —OH, lower alkyl, lower alkoxy or lower alkenyl; and het1 and het2 are independently a heterocyclic group; with the proviso that the fused ring C-D is not