diff --git a/synthesis/formula.py b/synthesis/formula.py
index 6aa7cdb..4cc8fd9 100644
--- a/synthesis/formula.py
+++ b/synthesis/formula.py
@@ -44,7 +44,7 @@ class StructuralFormulaImageGenerator:
             pass
 
     @debug_log()
-    @retry(10, errors=ValueError)
+    @retry(100, errors=ValueError)
     def __generate_images_for_functional_group(self, smiles: Iterable[str], functional_group: str):
 
         AllChem.Compute2DCoords(self.templates[functional_group])
diff --git a/synthesis/segment/plot.py b/synthesis/segment/plot.py
index 82698e3..4787f2f 100644
--- a/synthesis/segment/plot.py
+++ b/synthesis/segment/plot.py
@@ -40,7 +40,7 @@ class RandomPlot(RandomContentRectangle):
                     self.generate_random_histogram,
                     self.generate_random_pie_chart,
                     self.generate_random_heat_map,
-                    self.generate_random_structural_formula
+                    self.generate_random_structural_formula,
                 ]
             )
         elif is_wide(rectangle):
@@ -49,6 +49,7 @@ class RandomPlot(RandomContentRectangle):
                     self.generate_random_line_plot,
                     self.generate_random_histogram,
                     self.generate_random_bar_plot,
+                    self.generate_random_structural_formula,
                 ]
             )
         elif is_tall(rectangle):
@@ -56,6 +57,7 @@ class RandomPlot(RandomContentRectangle):
                 [
                     self.generate_random_bar_plot,
                     self.generate_random_histogram,
+                    self.generate_random_structural_formula,
                 ]
             )
         else:
@@ -145,7 +147,8 @@ class RandomPlot(RandomContentRectangle):
 
     def generate_random_structural_formula(self, rectangle: Rectangle):
         image = generate_image_of_structural_formula(size=rectangle.size)
-        self.content = image if not self.content else superimpose(self.content, image)
+        if image:
+            self.content = image if not self.content else superimpose(self.content, image)
 
     def generate_plot_kwargs(self, keywords=None):
 
diff --git a/synthesis/segment/segments.py b/synthesis/segment/segments.py
index f644e6a..c0e729e 100644
--- a/synthesis/segment/segments.py
+++ b/synthesis/segment/segments.py
@@ -80,11 +80,11 @@ def generate_random_text_block(rectangle: Rectangle, n_sentences=None) -> Conten
 
 
 def generate_random_image_caption(rectangle: Rectangle) -> ContentRectangle:
-    return generate_random_caption(rectangle, f"Fig {rnd.randint(1, 20)}")
+    return generate_random_caption(rectangle, f"Fig. {rnd.randint(1, 20)}")
 
 
 def generate_random_table_caption(rectangle: Rectangle) -> ContentRectangle:
-    return generate_random_caption(rectangle, f"Tabl {rnd.randint(1, 20)}")
+    return generate_random_caption(rectangle, f"Tabl. {rnd.randint(1, 20)}")
 
 
 def generate_random_caption(rectangle: Rectangle, caption_start, n_sentences=None) -> ContentRectangle:
diff --git a/synthesis/text/text_block_generator/caption.py b/synthesis/text/text_block_generator/caption.py
index 78ff3bf..bac82a7 100644
--- a/synthesis/text/text_block_generator/caption.py
+++ b/synthesis/text/text_block_generator/caption.py
@@ -17,6 +17,6 @@ class CaptionGenerator(TextBlockGenerator):
 
     def generate_paragraph(self, rectangle, n_sentences):
         lines = generate_random_text_lines(rectangle, self.line_formatter, n_sentences)
-        first_line_modified = f"{self.caption_start}.: {first(lines)}"
+        first_line_modified = f"{self.caption_start}: {first(lines)}"
         lines = conj(first_line_modified, rest(lines))
         return lines