Constraints of the formation and abundances of methyl carbamate, a
  glycine isomer, in hot corinos
  Methyl carbamate CH$_3$OC(O)NH$_2$ is an isomer of glycine. Quantum chemical
analyses show that methyl carbamate is more stable isomer than glycine. Because
of this, there could be a higher chance for methyl carbamte to exist in the
interstellar medium as compared to glycine. Despite immense searches, till now
glycine has not been detected in the ISM, therefore it is worthwhile to search
its isomer methyl carbamate. In this paper, we present the constraints of
methyl carbamate formation under the interstellar conditions. Large complex
organic molecules are favorably produced in hot-corino environments of low mass
protostars. We for the first time carried out astrochemical modeling focusing
on the formation of methyl carbamate in physical conditions similar to
hot-corino objects. Consequently, we examined ALMA archival data for existing
spectral line observations toward hot corinos NGC1333 IRAS 4A2 and IRAS 16293B.
Within the common spectral range towards these sources, we found three features
are possibly related to the spectral transitions of methyl carbamate and
consequently estimate the upper limit of column densities. Results of chemical
modeling are consistent with the observational upper limit of estimated column
density/abundance toward the sources. This may hint the validation of the
proposed formation mechanism. Future observations using telescope like ngVLA
may confirm the presence of MC toward the hot corinos.
