3D Mind will cluster your compounds for you.
and it can also show you what else are in that cluster.

go into 3D Mind tools and use node 23+18 (cluster 16.8 + 17.9)
or node 13+11+7+3+...

or you can search by SMILE string: "C1CC3=C(CO1)CN2CC5=C(C2=C3)N=C4C=CC=CC4=C5" here