Quinoline, C9H7N, is a bicyclic, N-containing aromatic compound that has
been sought in interstellar sources unsuccessfully on at least two occasions. In 2005,
Charnley and coworkers searched for quinoline,
isoquinoline, pyridine, and pyrimidine toward
carbon-star sources CRL 618 and
A subsequent search reported in 2017 by
Cordiner and co-workers was not able to detect
quinoline, isoquinoline, or pyrimidine toward TMC-1.
Three telescopes were used in the two studies: the
12m (36 foot) telescope at
Kitt Peak National Observatory and the
IRAM telescope were used for the 2005 search, while the
Green Bank Telescope was used for both studies.