如何在 Latex 文本中写出 1,4 糖苷键？

Question

我想写

\documentclass[12pt, a4paper, openright, twoside]{report}
\usepackage[english]{babel}
\usepackage{textgreek}
\usepackage[utf8x]{inputenc}  %ÄÖÜß und griechische Buchstaben

\usepackage{chemfig} %Erstellen von Skelettformeln organischer Substanzen
\usepackage[version=3]{mhchem} % \ce zum Darstellen von chemischen Formeln
\usepackage{pgfplots}

\begin{document}

It is a polymer consisting primarily of 1\ce{\rightarrow}\!4-linked 2-\textit{O}-sulfated \textsc{l}-iduronic acid  and 6-\textit{O}-sulfated, \textit{N}-sulfated glucosamine

\end{document}

但是在箭头之后和 4 之前有一个空格。我该如何去掉那个空格？

Answer 1

我只需要写类似

1$\to$4

实际上我可能会用chemmacros对于文档，无论如何，并为此定义一个宏，也许

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}

\usepackage{chemmacros}
\NewChemIUPAC\glycosidiclink{\ensuremath{\to}}

\newcommand*\glc[2]{#1\glycosidiclink#2}

\begin{document}

It is a polymer consisting primarily of \glc{1}{4}-linked 2-\oxygen-sulfated
\laevus-iduronic acid and 6-\oxygen-sulfated, \nitrogen-sulfated glucosamine

\end{document}

Answer 2

使用以下命令调整 4 的位置\kern：

\documentclass[12pt, a4paper, openright, twoside]{report}
\usepackage[english]{babel}
\usepackage[utf8x]{inputenc}  %ÄÖÜß und griechische Buchstaben

\usepackage[version=3]{mhchem} % \ce zum Darstellen von chemischen Formeln

\begin{document}

It is a polymer consisting primarily of 1\ce{\rightarrow}\!{\kern-.2em{4}}-linked 2-\textit{O}-sulfated \textsc{l}-iduronic acid  and 6-\textit{O}-sulfated, \textit{N}-sulfated glucosamine

\end{document}

我使用了负值来\kern将 4 放置在箭头更远处。您甚至可以将其放置在箭头内部，例如{\kern-.5em{4}}。