Toward the limits of complexity of interstellar chemistry: Rotational spectroscopy and astronomical search for n- and i-butanal

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Table 11

Molecular ratios of aldehydes toward Sgr B2(N1S) and G+0.693-0.027.

Ratio	Sgr B2(N1S)	G+0.693-0.027
CH₃CHO/C₂H₅CHO^(a)	>5−11	~7
C₂ H₅CHO ^(a)/C₃H₇CHO^(b)	−	>9
CH₃CHO/C₃H₇CHO^(b)	>2−6	>63

Notes. ^(a) Using the s– conformer;^(b) using the ct – n conformer.

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