Indoles that help in cancer prevention are found in

Indoles that help in cancer prevention are found in Cole crops.
Indole-3-carbinol is formed from a substance called glucobrassicin found in vegetables such as broccoli, Brussels sprouts, cabbage, collards, cauliflower, kale and mustard greens, turnips and rutabagas.
Indoles constitute extensively explored heterocyclic ring systems with a wide range of applications in pathophysiological conditions that is, cancer, microbial and viral infections, inflammation, depression, migraine, emesis, hypertension, etc.