SMILES Guide
Wikipedia on Simplified Molecular Input Line-Entry System
You can also look up SMILES notation on Wikipedia for any particular compound
Drawer to SMILES
Example Molecules
Bonds
Single bond
CCCC
CCCCDouble bond
CCC=C
CCC=CTriple bond
CCC#C
CCC#CNote: for some reason,
CC#C
renders as
CC#Cwhen it should look more like -=
Aromatic bond
c1ccccc1
c1ccccc1