Quote from [link to www.universetoday.com (secure)]

"But one thing stood out among the evidence that didn’t fit with the asteroid definition: Ryugu has a high concentration of organic matter." "The organic molecules detected include CO, CO2, methanol, carbonyl sulphide, formaldehyde, formic acid, methane, and cyanate."

“The local concentration may account for the extremely high organic content inferred from albedo,” the paper states."

Asteroid Ryugu originated from Mars, no matter you call it an asteroid or a comet. Evidence for my claim: [link to www.flickr.com (secure)]