Table 1.

Qualitative and quantitative summary (in ppb) of uracil and other N-heterocyclic molecules identified in the Ryugu samples (A0106, C0107) and Orgueil meteorite

	A0106	C0107	Orgueil		Orgueilc	Murchisond	Murrayd	Tagish Laked
	Hydrolyzed	Hydrolyzed	Unhydrolyzed	Hydrolyzed	H2O and HCOOH extracts	H2O extracts	H2O extracts	H2O extracts
Uracil	11 ± 6a	32 ± 9	92	140	73	15	37	4
Imidazole-2-carboxylic acid	6	9 ± 1	12	12	–	19	14	4
Imidazole-4-carboxylic acid	17 ± 3	19 ± 3	136	218	–	90	99	19
Nicotinic acid	49 ± 1	99 ± 4	602	715	–	91	626	108
Picolinic acid	n.d.2	n.d.	n.d.	n.d.	–	–	–	–
Isonicotinic acid	49 ± 20	62 ± 23	237	203	–	53	307	118
Nicotinamide	n.d.	n.d.	214	n.d.	–	10	–	–
Isonicotinamide	n.d.	n.d.	38	n.d.	–	3	–	–
Picolinamide	n.d.	n.d.	n.d.	n.d.	–	1	–	–

^aAveraged value with an error on two measurements.

^bNot detected.

^cStoks and Schwartz⁸.

^dOba et al.¹¹.