# Numbering chemical intermediate compounds with chemstyle

I´m currently writing my bachelor thesis in chemistry and chose to number my compounds with chemstyle. And except of one little issue that works just fine: Is it possible to number intermediate compounds with roman numerals beginning with "I", "II"....? Thank you in advance.

\documentclass[a4paper,12pt,bibliography=totocnumbered]{scrartcl}
\usepackage[runs=2]{auto-pst-pdf}
\usepackage{bpchem}
\usepackage[tracking=bpchem]{chemstyle}

\begin{document}
\CNlabelnoref{cmpd:1}
\CNlabelnoref{cmpd:2}
\CNlabelnoref{cmpd:3}
\CNlabelnoref{cmpd:4}
\CNlabelsubnoref{cmpd:4}{one}
\CNlabelsubnoref{cmpd:4}{two}

\begin{scheme}[H]
\schemeref[TMP1]{cmpd:1}
\schemeref[TMP2]{cmpd:2}
\schemeref[TMP3]{cmpd:3}
\schemeref[TMP4]{cmpd:4}
\schemerefsub[TMP5]{cmpd:4}{one}
\schemerefsub[TMP6]{cmpd:4}{two}
\includegraphics{test-tmp.eps}
\end{scheme}

\end{document}

• Welcome to TeX.SX! It is easier to help you if you add a minimal working example that takes the form \documentclass{...}\usepackage{....}\begin{document}...\end{document}. If possible, it should compile and have the minimum amount of code needed to illustrate your problem. This makes it much easier for people to help you - and much more likely that they will! – Andrew Jun 14 '15 at 16:41
• numbering works fine but I´d like to have an alternate numbering with roman numerals. the major compounds should be numbered from 1, 2, 3,... but a few exceptions should be numbered from I, II, III, IV... I hope you get what I´m up to – Christian Jun 14 '15 at 17:14
• It's actually not chemstyle but (in your case) bpchem that does the numbering and defines the corresponding commands – clemens Jun 14 '15 at 18:15