“…A longstanding question in cosmochemistry is whether the chondritic organic compounds are formed in the ISM, in the protoplanetary disk or within asteroids during hydrothermal alteration ( Aléon, 2010;Alexander et al, 2014Alexander et al, , 2007Glavin et al, 2010;Remusat et al, 2010Remusat et al, , 2009Vinogradoff et al, 2017 ). A number of interstellar and nebular processes (ionmolecule reactions, gas-grain reactions, irradiation, heating) may lead to the formation of both soluble and insoluble OM ( Danger et al, 2016Herbst and van Dishoeck, 2009;Kuga et al, 2015;Laurent et al, 2015;Marcellus et al, 2017 ). Here, we investigated the impact of asteroidal hydrothermal conditions on a simple interstellar molecule such as HMT (which constitutes up to 50 wt% of ice analog residues - Cottin et al, 2001;Muñoz Caro and Schutte, 2003;Vinogradoff et al, 2015Vinogradoff et al, , 2013Vinogradoff et al, , 2012 assuming that it had been accreted by asteroids ( Caselli and Ceccarelli, 2012;Gudipati et al, 2015 ).…”