You sneak over and grab the materials.
Hmm, they seem pretty strong, you have no weapons on you right now, so there's no point in confronting them. They may be hostile. Speaking of materials, This is what you have so far:
Pot of Water 3/3
Flask of Posion 2/3
Candle
Alchemy Book I
Pumpkin
Metal Bars (?)x5
Wooden Plank (?)x1
Dragon Bust
Energy Sphere
Sprout - Ted