Ethanimine (CH3CHNH) was identified toward
North, Sgr B2(N), by
Loomis et al. in 2013.
The detection of both the E- and Z- isomers of ethanimine was made possible by new experimental
measurements of the spectra of the species. The lines were then identified in the
PRIMOS Project data from the
Green Bank Telescope. Twelve rotational
transitions of E-ethaninine and eight transitions of Z-ethanimine were identified.