The invention belongs to the technical field of agricultural chemicals, and particularly relates to an N-(1,3,4-oxadiazol-2-yl)arylcarboxamide compound or a salt thereof, a preparation method, a herbicidal composition and a use thereof. The compound is as shown in the following Formula I:

##STR00001## wherein X represents O, S, SO, SO.sub.2 or NR.sub.1; Y represents halogen, cyano, cyanoalkyl, carboxyl, nitro, etc.; or —X—Y represents unsubstituted or substituted five- or six-membered heterocyclyl or heteroaryl; Z represents hydrogen, halogen, cyano, OR.sub.4, -alkyl-OR.sub.4, —O-alkyl-N(R.sub.5).sub.2, etc., M represents hydrogen, OR.sub.6, SR.sub.6, COR.sub.6, COOR.sub.6, CON(R.sub.7).sub.2, etc. The compound has advantages of a low dosage for use, excellent herbicidal activity, and higher crop safety, especially good selectivity for key crops such as rice.

The disclosure describes chiral P(V)-based reagents and their uses for the modular, scalable, and stereospecific synthesis of chiral phosphines, phosphine oxides and particular oligonucleotides.

The disclosure describes chiral P(V)-based reagents and their uses for the modular, scalable, and stereospecific synthesis of chiral phosphines, phosphine oxides and particular oligonucleotides.

An additive for a non-aqueous electrolyte solution that can suppress the initial gas generation amount when used in a non-aqueous electrolyte solution battery. The additive for a non-aqueous electrolyte solution is represented by any one of formulae [1] to [4]: ##STR00001## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, X.sup.1, X.sup.2 and Y are as defined in the specification.

The present disclosure provides reagents that can be used to label synthetic oligonucleotides with rhodamine dyes or dye networks that contain rhodamine dyes.

The novel bisphosphonic acid ester derivatives represented by the following formula (1):

Y—Cy—(NH).sub.m—(CH.sub.2).sub.n—C(X)(PO(OR.sup.1)(OR.sup.2)).sub.2   (1)

wherein each symbol is as defined in the DESCRIPTION, which has an amino group substituted by a heterocyclic group or a heterocyclic group containing a nitrogen atom, and the acid moiety is esterified with a POM group, an n-butanoyloxymethyl (BuOM) group and the like, exhibit a superior direct or indirect cytotoxicity effect on tumor cells and virus infected cells.

The novel bisphosphonic acid ester derivatives represented by the following formula (1):

Y—Cy—(NH).sub.m—(CH.sub.2).sub.n—C(X)(PO(OR.sup.1)(OR.sup.2)).sub.2   (1)

wherein each symbol is as defined in the DESCRIPTION, which has an amino group substituted by a heterocyclic group or a heterocyclic group containing a nitrogen atom, and the acid moiety is esterified with a POM group, an n-butanoyloxymethyl (BuOM) group and the like, exhibit a superior direct or indirect cytotoxicity effect on tumor cells and virus infected cells.

The present invention relates to the use of oxazolidinone-quinolone hybrids for the parenteral (especially intravenous) treatment or prophylaxis of bacterial diseases. The present invention relates moreover to improved methods of administering oxazolidinone-quinolone hybrid antibacterials.

The present invention relates to the use of oxazolidinone-quinolone hybrids for the parenteral (especially intravenous) treatment or prophylaxis of bacterial diseases. The present invention relates moreover to improved methods of administering oxazolidinone-quinolone hybrid antibacterials.

Compounds and methods are provided for treating bacterial infections.