http://goldloadingpage.com/understanding-the-term/1876
👉 Common directory name
C:/1876/
https://goldloadingpage.com/word-dictionary/1876
👉 It's a dienone.
1876. 1-HEXYL-4-(NONAN-5-YL)PYRIDIN-1-IUM BROMIDE; 676346-14-8
https://goldloadingpage.com/word-dictionary/1876. 1-HEXYL-4-(NONAN-5-YL)PYRIDIN-1-IUM BROMIDE; 676346-14-8