Tracing early life on Mars: lessons from organics produced in high-altitude hotsprings of Ladakh

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Table 3 List of the organic compounds observed in the nonthermal groundwater samples from the hand pumps near the Changlung, Chumathang, Panamik, and Puga hot spring sites

Compounds	Retention time (RT)	Chumathang HS	Panamik HS	Changlung HS	Puga HS	Chumathang GW	Panamik GW
Silane, [(1-methoxy-1,3-propanediyl)bis(oxy)]bis[trimethyl-	6.41	+ +	+ +	+ +
Cyclotetrasiloxane, octamethyl-	7.3	+
Methyltris(trimethylsiloxy)silane	9.14/9.81	+	+
4-Tert-octylphenol, TMS derivative	9.81	+
Tetrasiloxane, decamethyl-	9.81	+ +
Pentasiloxane, dodecamethyl-	13.91/16	+ +	+ +	+
Trisiloxane, 1,1,1,5,5,5-hexamethyl-3,3-bis[(trimethylsilyl)oxy]-	16	+
Hexasiloxane, tetradecamethyl-	21.56/21.57	+ +	+	+ +	+ +
Cycloheptasiloxane, tetradecamethyl-	24.02	+
Heptasiloxane, hexadecamethyl-	26.49/26.50	+	+	+	+	+	+
Heptasiloxane, 1,1,3,3,5,5,7,7,9,9,11,11,1 3,13-tetradecamethyl-	26.5	+
Cyclooctasiloxane, hexadecamethyl-	28.82	+
Cyclononasiloxane, octadecamethyl-	32.99	+
Octasiloxane, 1,1,3,3,5,5,7,7,9,9,11,11,1 3,13,15,15-hexadecamethyl-	39.93	+	+	+	+
Cyclodecasiloxane, eicosamethyl-	45.35/46.31	+	+	+	+

In the table, + + + + , + + + , + + , and + denote excellent match, good match, fair match, and below fair match, respectively