\documentclass[12pt,border=-2pt,tikz,class=scrartcl]{standalone}\usepackage[T1]{fontenc}\usepackage[latin1]{inputenc}\usepackage{lmodern}\usetikzlibrary{positioning,calc}\usepackage{chemfig,chemmacros}\renewcommand*{\familydefault}{\sfdefault}\renewcommand*\printatom[1]{\ensuremath{\mathsf{#1}}}\setatomsep{1.5em}\setdoublesep{.6ex}\setarrowdefault{,1.5,thick}\setbondstyle{thick}\pagestyle{empty}\begin{document}\begin{tikzpicture}\node (n1) {\chemfig{[:18]*5(-=-O-=)}};
\node [left=.3em of n1] {\chemfig{*6(-N-=-(=O)-=)}};
\node [right=.3em of n1] {\chemfig{[:18]*5(-=-\lewis{0:,C}-=)}};
\node [above=.1em of n1] {furan};
\end{tikzpicture}\end{document}
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This image of a simple structural formula is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
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Acest fișier conține informații suplimentare, introduse probabil de aparatul fotografic digital sau scannerul care l-a generat. Dacă fișierul a fost modificat între timp, este posibil ca unele detalii să nu mai fie valabile.