Patch is attached Anton
diff -Nru openbabel-2.3.2+dfsg/debian/changelog openbabel-2.3.2+dfsg/debian/changelog
--- openbabel-2.3.2+dfsg/debian/changelog 2013-05-22 19:08:45.000000000 +0200
+++ openbabel-2.3.2+dfsg/debian/changelog 2013-10-13 08:04:13.000000000 +0200
@@ -1,3 +1,10 @@
+openbabel (2.3.2+dfsg-1.1) UNRELEASED; urgency=low
+
+ * Non-maintainer upload.
+ * Replace libeigen2-dev by libeigen3-dev. (Closes: #726179)
+
+ -- Anton Gladky <gl...@debian.org> Sun, 13 Oct 2013 07:56:46 +0200
+
openbabel (2.3.2+dfsg-1) unstable; urgency=low
* New upstream release.
diff -Nru openbabel-2.3.2+dfsg/debian/control openbabel-2.3.2+dfsg/debian/control
--- openbabel-2.3.2+dfsg/debian/control 2013-05-21 23:18:44.000000000 +0200
+++ openbabel-2.3.2+dfsg/debian/control 2013-10-13 07:47:33.000000000 +0200
@@ -7,7 +7,7 @@
Build-Depends: cmake,
debhelper (>> 7.0.50~),
libcairo2-dev,
- libeigen2-dev,
+ libeigen3-dev,
libperl-dev,
libwxgtk2.8-dev,
libxml2-dev,
signature.asc
Description: OpenPGP digital signature
