Table 2. Summary of biological activities of the compounds (1)–(6) in human prostate cancer cells.

Actitiy*	Compound
	(1)	(2)	(3)	(4)	(5)	(6)
Cytotoxicity	++	+++	+	+++	+	++
Anti-proliferative activity	+	++	+	++	+	+
Pro-apoptotic activity	++	+++	+	+++	+	++
Autophagy inhibition	++	++	+++	+++	+	+
AR signaling inhibition	–	+++	–	+++	-	++

^*“+++” – high activity; “++” – moderate activity; “+” – low activity; “–” – no activity.