In this task, you are given a sentence. You are expected to recognize the name of any form of chemical substances. Although there might be several correct answers, you need to write one of them.

Input: Consider Input: Site dependent intestinal absorption of darunavir and its interaction with ketoconazole.

Output: darunavir


Input: Consider Input: Inhibition of Th1/Th17 responses via suppression of STAT1 and STAT3 activation contributes to the amelioration of murine experimental colitis by a natural flavonoid glucoside icariin.

Output: flavonoid


Input: Consider Input: Immunoregulatory effects of Glycyrrhizic acid exerts anti-asthmatic effects via modulation of Th1/Th2 cytokines and enhancement of CD4(+)CD25(+)Foxp3(+) regulatory T cells in ovalbumin-sensitized mice.


Output: Glycyrrhizic acid