TY CONF TI Study of a compact source with an enhanced NH$_2$D/NH$_3$ abundance ratio in the S187 region KW ISM: clouds KW molecules; individual: S187 JO Modern astronomy: from the Early Universe to exoplanets and black holes AU Trofimova, E.. AU Zinchenko, I.. AU Zemlyanukha, P.. AU Punanova, A.. AU Henkel, C.. PY 2024 PB Special Astrophysical Observatory of the Russian Academy of Sciences