Chemistry and distribution of daughter species in the circumstellar envelopes of O-rich AGB stars Xiaohu Li, Tom J. Millar, Alan N. Heays, Catherine Walsh, Ewine F. van Dishoeck and Isabelle Cherchneff A&A, 588 (2016) A4 Published online: 09 March 2016 DOI: 10.1051/0004-6361/201525739