Exploring circumstellar chemistry in X-ray emitting AGB stars J. Alonso-Hernández, C. Sánchez Contreras, M. Agúndez, R. Sahai, J. P. Fonfría, L. Velilla-Prieto, G. Quintana-Lacaci and J. Cernicharo A&A, 698 (2025) A319 Published online: 26 June 2025 DOI: 10.1051/0004-6361/202553819