7-Bromoquinazoline-2,4(1H,3H)-Dione (7-Bromo-2,4(1H,3H)-quinazolinedione) is a marine derived natural products found in Pyura sacciformis.

Fumiquinazoline D is a fungal metabolite originally isolated from A. fumigatus that has activity against Gram-positive and Gram-negative bacteria (MICs = 8-16 μg/ml) as well as F. solani and C. albicans fungi (MICs = 32 and 64 μg/ml, respectively).

Vasicinone may act as a hepatoprotective agent. (±)-Vasicinone has significant antitussive, expectorant, and bronchodilating activities, which can be used to treat respiratory disease.(S)-Vasicinone exhibits antiproliferative activity against human gastric cancer cells MCG-803.

Tryptanthrin is a natural DNA gyrase inhibitor.