2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/11854A brief overview is given of the current status of molecular emission line observations at high redshift. New observations are presented of CO in the gravitationally lensed quasar MG 0414+0534 (detected) and the unlensed quasar PG 1634+706 (not detected). Also noted are the results of a partially completed search for water maser emission in several redshift bands above z=0.4.To appear in ``Highly Redshifted Radio Lines,'' eds C. Carilli et al. Latex file, 6 pages, with 1 ps file. Requires aaspp4.sty and psfig.sty, includedAstrophysicstext