Hi, I think Noel’s suggestion is correct.
I use SMARTSviewer to work out SMARTS queries. http://smartsview.zbh.uni-hamburg.de <http://smartsview.zbh.uni-hamburg.de/> Cheers Chris > > Message: 2 > Date: Mon, 12 Sep 2016 10:01:10 +0100 > From: "Noel O'Boyle" <[email protected]> > Subject: Re: [Open Babel] SMARTS question > To: Gravestock David GBJH <[email protected]> > Cc: "[email protected]" > <[email protected]> > Message-ID: > <caoc-gk1rop98h0fntlz1bpwu+cm1bg7swsfcwl3bjqnkyvw...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Does [!#1] work? > > On 12 September 2016 at 09:23, Gravestock David GBJH < > [email protected]> wrote: > >> Good day, >> >> >> >> I wonder if somebody could help me with the construction of a SMARTS >> pattern? >> >> >> >> How does one specify a non-hydrogen atom? For example, when I use >> [CH3]C([!H])=O to specify the generalised molecule below where A = any >> non-hydrogen atom I don?t get back the correct results. >> >> >> >> >> >> The [!H] seems to specify that the atom does not have one further H atom. >> >> >> >> Regards, >> >> David
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