Abstract: A stable isotope-labeled indole carboxylic acid compound represented by Formula (I) is provided. In Formula (I), X1 to X8 are each independently C or 13C; Y is N or 15N; M is H, Na, K, Li, CH3, or C2H5; R1 is H or D; R2 is H, CH3, 13CH3, C2H5, or 13C2H5; R3 is H, CH3, 13CH3, C2H5, or 13C2H5; R4 is H or D; and R5 is H or D.

Abstract: An estrogen derivatization method uses a quaternary cation-containing 5-fluoro-2,4-dinitrophenyl compound represented by Formula (1): where in Formula (1), X is a quaternary cation. A mass spectrometry method includes derivatizing estrogen by the above estrogen derivatization method. A derivatization reagent derivatizing estrogen includes a quaternary cation-containing 5-fluoro-2,4-dinitrophenyl compound represented by Formula (1), where in Formula (1), X is a quaternary cation.

Abstract: Provided are a stable triazolinedione adduct, a method for producing the same, a method for producing an ene compound, and a method for analyzing an ene compound. A triazolinedione adduct that is stable until the time of use and can be reacted while reverting to a triazolinedione compound at the time of use. Specifically, a triazolinedione adduct represented by formula (1). (In the formula, R1 is an organic group, and A is a fused ring of three or more rings including at least one aromatic ring.

Abstract: A standard calibration solution includes water, a non-alcoholic solvent that is mixed with water, and a steroid hormone, and a content of the non-alcoholic solvent is 10% by volume or more and 50% by volume or less. The standard calibration solution is used for quantitative measurement using a mass spectrometry device.

Abstract: Provided is a method for analyzing a diene compound including: a triazolinedione adduct heating step of heating a triazolinedione adduct to produce a triazolinedione compound; an ene compound formation step of reacting the triazolinedione compound with a diene compound to obtain an ene compound; and an ene compound analysis step of analyzing the ene compound to quantitative determine the diene compound. Also provided is a method for producing an ene compound, including: a triazolinedione adduct heating step of heating a triazolinedione adduct to produce a triazolinedione compound; and an ene compound formation step of reacting the triazolinedione compound with a diene compound to obtain an ene compound.

Abstract: A compound represented by Chemical formula 1: wherein n is an integer of 2 or more, is provided. Also provided is a derivatization reagent for derivatizing a diene-containing compound, including a compound represented by Chemical formula 1. Further provided is a synthesis method for a compound, including a nucleophilic substitution reaction between an aryl halide and a heterocyclic amine compound being saturated, the compound being represented by Chemical formula 1.

Abstract: The present invention is intended to provide a compound useful to analyze a vitamin D compound. The present invention provides an alkyne compound represented by Formula (I): where in Formula (I), A is a linear carbon chain having an alkynyl group at an end and having a vinyl group at another end; X1 is CH or 13CH; X2 is CHY, CDY, 13CHY, 13CDY, CO, 13CO, C18O, or 13C18O; m is an integer from 1 to 4; when m is 2 or more, X2s are identical or different; Y is H, D, NH2, 15NH2, OH, 18OH, SH, OR, O(CO)R, OSO3H, OSO3Na, or a sugar substituent; when Formula (I) contains two or more Ys, Ys are identical or different; R is an alcohol protective group, an alkyl group, an alkenyl group, or an aryl group; X3 is C or 13C; and at least one selected from the group consisting of X1, X2(s), and X3 is modified with a stable isotope D, 13C, 18O, or 15N.

Abstract: Provided is a phosphonium compound represented by Formula (I): in Formula (I), R1, R2, and R3 are independently from each other, an alkyl group or an aryl group, the alkyl group is a substituted or unsubstituted, linear or branched alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted cyclic alkyl group having 5 to 20 carbon atoms, the aryl group is a substituted or unsubstituted aryl group having 6 to 20 carbon atoms; X is a reactive group having a hydrazide group, a halide group, a pseudohalide group, or a thioester group; and Y? is an anion having a total charge of ?1, or Y? is absence.

Abstract: Provided is a solid phase mixture including an oxidizing agent and/or a salt of the oxidizing agent and solid phase particles. The oxidizing agent is a compound capable of selectively oxidizing 1,2-diol compounds. In addition, a packing material containing the solid phase mixture is provided. Further, a column packed with the packing material is provided.

Abstract: A compound represented by Chemical formula 1: wherein n is an integer of 2 or more, is provided. Also provided is a derivatization reagent for derivatizing a diene-containing compound, including a compound represented by Chemical formula 1. Further provided is a synthesis method for a compound, including a nucleophilic substitution reaction between an aryl halide and a heterocyclic amine compound being saturated, the compound being represented by Chemical formula 1.

Abstract: Provided is a method for industrially producing a triazolidinedione compound at a high purity and a high yield. A precipitation step for preparing a solution that contains a triazolidinedione compound represented by formula (1) and precipitating the triazolidinedione compound therefrom is performed. In this step, the pH of the solution is adjusted to 3.0 to 8.5 and the solution is prepared so as to contain 3-15 parts by volume of solvents for 1 part by mass of the triazolidinedione compound. (In the formula, R1 is a substituted or unsubstituted amino group-bearing organic group.

Abstract: Provided is a method for producing a high-purity, high-quality semicarbazide compound at a high yield by a simple method. The semicarbazide compound is recrystallized by a solvent containing a halogenated hydrocarbon. Dichloromethane is preferred as the halogenated hydrocarbon.

Abstract: Provided are a stable triazolinedione adduct, a method for producing the same, a method for producing an ene compound, and a method for analyzing an ene compound. A triazolinedione adduct that is stable until the time of use and can be reacted while reverting to a triazolinedione compound at the time of use. Specifically, a triazolinedione adduct represented by formula (1). (In the formula, R1 is an organic group, and A is a fused ring of three or more rings including at least one aromatic ring.

Abstract: Provided is a method for industrially producing a triazolidinedione compound at a high purity and a high yield. A precipitation step for preparing a solution that contains a triazolidinedione compound represented by formula (1) and precipitating the triazolidinedione compound therefrom is performed. In this step, the pH of the solution is adjusted to 3.0 to 8.5 and the solution is prepared so as to contain 3-15 parts by volume of solvents for 1 part by mass of the triazolidinedione compound. (In the formula, R1 is a substituted or unsubstituted amino group-bearing organic group.

Abstract: A standard calibration solution includes water, a non-alcoholic solvent that is mixed with water, and a steroid hormone, and a content of the non-alcoholic solvent is 10% by volume or more and 50% by volume or less. The standard calibration solution is used for quantitative measurement using a mass spectrometry device.

Abstract: Provided is a method for analyzing a diene compound including: a triazolinedione adduct heating step of heating a triazolinedione adduct to produce a triazolinedione compound; an ene compound formation step of reacting the triazolinedione compound with a diene compound to obtain an ene compound; and an ene compound analysis step of analyzing the ene compound to quantitative determine the diene compound. Also provided is a method for producing an ene compound, including: a triazolinedione adduct heating step of heating a triazolinedione adduct to produce a triazolinedione compound; and an ene compound formation step of reacting the triazolinedione compound with a diene compound to obtain an ene compound.

Abstract: Provided is a method for producing a high-purity, high-quality semicarbazide compound at a high yield by a simple method. The semicarbazide compound is recrystallized by a solvent containing a halogenated hydrocarbon. Dichloromethane is preferred as the halogenated hydrocarbon.

Abstract: Provided are a method for separating a DAPTAD-containing triazolinedione compound in solid form from a reaction solution, a separated solid triazolinedione compound, and a novel method for producing a triazolinedione compound. A triazolinedione solution in which a DAPTAD-containing triazolinedione compound is dissolved is brought into contact with a C5-15 hydrocarbon-based poor solvent to obtain a solid triazolinedione compound. Also, a triazolinedione compound is oxidized using an oxidizing agent that does not produce acid as a byproduct to obtain a triazolinedione compound.

Abstract: Provided is an oxidant including a hypervalent iodine compound which has iodobenzene micelle-incarcerated by a surfactant as a basic structure and is hydrophobic.

Abstract: A simple and efficient method of preparing a sample in the measurement according to matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) capable of inhibiting any ion suppression by impurities, such as inorganic salts and surfactants, contained in the sample. An analyte and matrix molecules are co-crystallized in the presence of porous microparticles. Preferably, this co-crystallization is carried out by bringing the analyte, matrix molecules and porous microparticles into contact with each other on a target plate and thereafter drying the mixture. The porous microparticles consist of an ion exchanger having an average particle diameter of not more than 50 ?m, preferably a strongly basic anion exchanger.