The SMILES format
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The result appears here, with a picture of every structure.
How to do it
Paste SMILES below, one per line.
Choose what to convert them to.
Copy or download the result.
A structure as one line of text
SMILES (Simplified Molecular Input Line Entry System) was introduced by David Weininger in 1988 and is now written down as the OpenSMILES specification. Atoms are their element symbols; C, N, O, S, P, B and the halogens get their hydrogens implied, and anything else goes in brackets with its hydrogens and charge, as in [NH4+]. Bonds are - (usually left out), = and #; branches go in parentheses; and a ring is closed by repeating a number, so cyclohexane is C1CCCCC1.
Aromatic atoms may be written in lower case (benzene is c1ccccc1) or with alternating double bonds (C1=CC=CC=C1, the Kekulé form Athanor writes). Stereochemistry is written with @ and @@ around a stereocenter and / and \ around a double bond.
What it leaves out
A SMILES string has no coordinates, so it says nothing about how a structure is drawn or its 3D shape. One molecule has many valid SMILES, and each program writes its own canonical one, so two strings that differ can still be the same molecule.
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