Provided herein are compounds, compositions, kits, uses, and methods for assessing the viability of cells and/or quantifying the amount of live and dead cells in a mixture using differential stains. In some embodiments, the compounds are used in culture media or can function independently of fixation and/or permeabilization. In some embodiments, the compounds comprise a platinum atom. In some embodiments, the compounds comprise a nitrogen mustard moiety.

Provided herein is a use of a high-boiling solvent in a mixture comprising a (thio)phosphoric acid derivative and a process including the addition of a high-boiling solvent to a mixture comprising a (thio)phosphoric acid derivative to recover the (thio)phosphoric acid from the mixture by an evaporation process.

Provided herein are compounds of formula I: wherein the variables are defined herein, processes of making them, and methods of treating cancer comprising administering such compounds.

##STR00001##

Disclosed is a compound containing structure of a heteroaromatic ring, pharmaceutical composition thereof and application thereof. The present disclosure provides a compound containing structure of a heteroaromatic ring represented by formula I, a pharmaceutically acceptable salt thereof, a stereoisomer thereof, an isomer thereof or an isotopic compound thereof. The compound containing structure of a heteroaromatic ring is expected to treat and/or prevent various PARG-related diseases.

##STR00001##