TY CONF TI Study of the physical and chemical properties of dense clumps in several high-mass star-forming regions KW ISM: abundances KW molecules; stars: formation KW massive; astrochemistry JO Modern astronomy: from the Early Universe to exoplanets and black holes AU Pazukhin, A.. AU Zinchenko, I.. AU Trofimova, E.. PY 2024 PB Special Astrophysical Observatory of the Russian Academy of Sciences