For citations:

Pyrko A.N. Synthesis and using of 10-hydroxy-3,3,6,6-tetramethyl-9-(4-hydroxy-3-methoxyphenyl)-1,2,3,4,5,6,7,8,9,10-decahydroacridin-1,8-dion as acid base titration indicator. Proceedings of Universities. Applied Chemistry and Biotechnology. 2020;10(4):556-563. https://doi.org/10.21285/2227-2925-2020-10-4-556-563