January Ethylene
C2H4
Ethylene
February C6H- C6H-
March Phosphine
PH3
PH3
April Methylidyne ion
CH+
CH+
May Ketenimine
CH2CNH
CH+
June Methyl Acetylene
CH3CCH
CH+
July Nitric Oxide
NO
NO
August Silane
SIH4
Silane
September Protonated CO
HCO+
HCO+
October Acetaldehyde
CH3CHO
Acetaldehyde"
November Cyanoethynyl radical
C3N
Acetaldehyde"
December Cyclopropenone
c-H2C3O
Cyclopropenone"
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