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-rw-r--r--graphics/chemobabel/README.md15
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diff --git a/graphics/chemobabel/README.md b/graphics/chemobabel/README.md
index 397c15cad3..7cd66d5e69 100644
--- a/graphics/chemobabel/README.md
+++ b/graphics/chemobabel/README.md
@@ -7,20 +7,29 @@ ChemDraw files or SMILES notations using Open Babel.
This package offers a new choice for chemists who need
chemical structures in LaTeX documents.
With this package you can insert chemical structural formulas
-into your PDF files easily with the help of Open Babel and Inkscape.
+into your documents easily with the help of Open Babel.
Various chemical formats are allowed for input,
for example, `.cdx`, `.mol` and `.smi`.
## Package Contents
- - chemobabel.sty: Package itself
+ - chemobabel.sty: Package itself; provides `\chemobabel` and `\smilesobabel`
- chemobabel-{en,ja}.pdf: Basic usage (source: chemobabel.dtx)
- example-en.{tex,pdf}: Examples in English
- example-ja.{tex,pdf}: Examples in Japanese
Sample ChemDraw files and MDL Molfiles are also included.
+## Requirements
+
+To use this LaTeX package, it is necessary to enable execution
+of the following external commands via `latex -shell-escape`.
+
+ - `obabel` (Open Babel)
+ - `inkscape` or `rsvg-convert` (for SVG -> PDF/EPS conversion)
+ - `pdfcrop` or `ps2eps` (optional; for cropping large margins of PDF/EPS)
+
## License
This package is distributed under the BSD 2-Clause License.
@@ -43,7 +52,7 @@ This work is based on a lot of resources published online:
## Release Date
-2022-10-09
+2022-10-22
--------------------
Hironobu YAMASHITA (aka. "Acetaminophen" or "@aminophen")