Complex sentence: No firm evidence of water, organics or other chemical compounds has been obtained, though 4709 Ennomos has an albedo slightly higher than the Trojan average, which may indicate the presence of water ice.
Split into simpler sentences: No firm evidence of water, organics or other chemical compounds has been obtained. However, 4709 Ennomos has an albedo slightly higher than the Trojan average, which may indicate the presence of water ice.