// Copyright (C) 2003 Rational Discovery LLC
// NOTE: larger functional groups should come before smaller ones involving the 
//  the first atom in the SMARTS query is not part of the group itself
//   Code	SMARTS	Notes
//--------------------------------------------------
// O containing
-C(=O)O	*-C(=O)[O;H1,-]	carboxylic acids
-O	*-[O;H1,-]	alcohols
=O	*=O	aldehydes
//--------------------------------------------------
//         Nitrogen containing
-N(=O)O	   *-[N;D3](=O)O	nitro
-N=O	   *-N=[O;X1]	nitroso
-N-O	   *-N=[O;X1]	nitroso
=N-O	   *=N-[O;H1,-]	oximes
=NC	   *=N-[C;D1]	Imines
-N=C	   *N=[C;D1]	Imines
-N	   *-[N;H2,H1&-1,-2]	amines
=N	   *=[N;H,-1]	???
#N	   *#[N;X1]	nitriles

//--------------------------------------------------
//       S containing
-S	 *-[S;H1,-]	thiols
=S	 *=S		thiocarbonyls

//--------------------------------------------------
-X	*-[#9,#17,#35,#53]	halogens