I'm sorry for that bad titel. Thank you that you are here to read my hole problem.
I'm using sharelatex and the Latex compiler (no pdflatex). If I'm inserting a picture it will look in the build-in pdf viewer like that:

In the native pdf viewer (or Adobe Reader) the picture looks like that:

The ' s are missing. Can anyone help me or know that problem?
I have done a little example from my document:
\documentclass[a4paper, 12pt, english]{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage{textgreek}
\usepackage[english]{babel}
\usepackage{csquotes}
\usepackage{graphicx}
\usepackage[varioref=false]{chemstyle}
\usepackage[version=3]{mhchem}
\usepackage{bpchem}
\usepackage{helvet}
\renewcommand*{\familydefault}{\sfdefault}
\begin{document}
some text
\begin{figure}
\center
\psfrag*{mark1}[c][c]{\compound{RUBROA}}
\psfrag*{mark2}[c][c]{\compound{RUBROM}}
\psfrag*{mark3}[c][c]{\compound{RUBROr}}
\psfrag*{mark4}[c][c]{\compound{RUBROs}}
\includegraphics{rubross.eps}
\end{figure}
\end{document}
You can find the picture and my complete main.tex here.
Thank you for your help!

psfragpackage, which works only with postscript (eps) files; it works by replacing strings in that eps file according to your\psfragdefinitions. If you compile your document on your machine not with pdflatex but the old-fashioned way with latex -> dvips -> ps2pdf, it should work. – Michael Palmer Nov 20 '16 at 14:54\usepackage{tgheros}instead of\usepackage{helvet}? – Ulrike Fischer Nov 20 '16 at 15:58dvips -h hv______.pfb main(you need to findhv______.pfbon the net, see also https://tex.stackexchange.com/a/74307/2388). – Ulrike Fischer Nov 20 '16 at 16:13\usepackage{tgheros}works. thank you! Is tgehros a another font which is similiar to helvet/arial and is supported by the eps? – vincentm9 Nov 20 '16 at 16:21