page load fix

mdgo/forcefield/pubchem.py

@@ -145,8 +145,8 @@ def _obtain_entry_web(self, search_text: str, name: str, output_format: str) ->
             query = quote(search_text)
             url = "https://pubchem.ncbi.nlm.nih.gov/#query=" + query
             self.web.get(url)
-            time.sleep(1)
             loaded_element_path = '//*[@id="main-results"]/div[1]/div/ul'
+            self.wait.until(EC.presence_of_element_located((By.XPATH, loaded_element_path)))
             best_xpath = '//*[@id="featured-results"]/div/div[2]' "/div/div[1]/div[2]/div[1]/a/span/span"
             relevant_xpath = (
                 '//*[@id="collection-results-container"]'
@@ -157,7 +157,9 @@ def _obtain_entry_web(self, search_text: str, name: str, output_format: str) ->
                 match = self.web.find_element(By.XPATH, best_xpath)
             else:
                 match = self.web.find_element(By.XPATH, relevant_xpath)
+            self.wait.until(EC.element_to_be_clickable(match))
             match.click()
+            time.sleep(1)
             # density_locator = '//*[@id="Density"]/div[2]/div[1]/p'
             cid_locator = '//*[@id="Title-and-Summary"]/div/div/div/div[1]/div[2]'
             smiles_locator = '//*[@id="Canonical-SMILES"]/div[2]/div[1]'