N-Acetyldopamine dimer-2 (compound 2) is a N-acetyldopamine dimer that can be isolated from the yellow powder form Periostracum Cicadae with antioxidant and anti-inflammatory activities. N-Acetyldopamine dimer-2 inhibits oxidized low-density lipoprotein (LDL) oxidation, ROS generation, NO production, and NF-κB activity.

2,4,6-tribromobenzene-1,3,5-triol is a marine derived natural products found in Rhabdonia verticillata.

Otophylloside Q