fix on drugbank web changes

annotation/src/main/java/lcsb/mapviewer/annotation/services/DrugbankHTMLParser.java

@@ -197,8 +197,12 @@ public class DrugbankHTMLParser extends DrugAnnotation implements IExternalServi
 		String description = webpageContent.substring(startIndex, endIndex);
 		// find special html characters
 		description = StringEscapeUtils.unescapeHtml4(description);
+		description = cleanHtml(description);
+		if (description.equalsIgnoreCase("Not Available")) {
+			description = null;
+		}
 
-		return cleanHtml(description);
+		return description;
 	}
 
 	/**
@@ -390,9 +394,8 @@ public class DrugbankHTMLParser extends DrugAnnotation implements IExternalServi
 	 * @throws DrugSearchException
 	 *           thrown when there are problems with connection to DrugBank
 	 *           database
-	 * @return
-	 *          drug with the information abtained from drugbank or
-	 *          <code>null</code> if such data couldn't be found
+	 * @return drug with the information abtained from drugbank or
+	 *         <code>null</code> if such data couldn't be found
 	 */
 	private Drug findMoreInformation(String name) throws DrugSearchException {
 		Drug result = null;