Hi Guillaume, you have a trivalent oxygen here in your heterocycle "O2O"

Best,

Alexis


On 16 April 2018 at 16:29, Guillaume GODIN <guillaume.go...@firmenich.com>
wrote:

> Dear Andrew,
>
> Thank you!
>
> And for this one C[C@@]12CC[C@@](C)(CC1)O2O any idea
>
> Cause your tool failed too.
>
> BR,
>
> Guillaume
>
> Le 16.04.18 16:22, « Andrew Dalke » <da...@dalkescientific.com> a écrit :
>
>     If you try this out with my smiview package, available from
> https://bitbucket.org/dalke/smiview/downloads/ , it reports:
>
>
>     % smiview 'C\(C(C)C)=N/O'
>     Cannot parse --smiles: Unexpected term
>       C\(C(C)C)=N/O
>         ^ Tokenizing stopped here
>     A bond must be followed by an atom, closure.
>
>     That is, the bond symbol '\' may not be followed by a branch. (And I
> should improve that error message so it's more explicit.)
>
>     I think you are looking for the SMILES "C(\C(C)C)=N/O".
>
>                                 Andrew
>                                 da...@dalkescientific.com
>
>
>
>
>
>     > On Apr 16, 2018, at 16:15, Guillaume GODIN <
> guillaume.go...@firmenich.com> wrote:
>     >
>     > Dear All,
>     >
>     > Anyone know why this smile is not parse correctly ?
>     >
>     > C\(C(C)C)=N/O
>     >
>     > Best regards,
>     >
>     > Guillaume
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