Upper limits on CH3OH in the HD 163296 protoplanetary disk - Evidence for a low gas-phase CH3OH-to-H2CO ratioM. T. Carney, M. R. Hogerheijde, V. V. Guzmán, C. Walsh, K. I. Öberg, E. C. Fayolle, L. I. Cleeves, J. M. Carpenter and C. QiA&A, 623 (2019) A124DOI: https://doi.org/10.1051/0004-6361/201834353