$ grep "^x" --molecules
Molecules: Letter X
Showing 42 active substance nodes in the graph database.
X(1)
X-Treme(1)
X-Treme(0)
Xanthan Gum(1)
Xenon(1)
Xenon Xe-133(1)
Xerac Ac(0)
Xl(27)
Xray Pellet(1)
Xylazine(2)
Xylazine(1)
Xylazine(1)
Xylazine Hcl(1)
Xylazine Hcl(0)
Xylocaine(1)
Xylocaine(0)