Mespirenone
Mespirenone ( INN ) ( developmental code name ZK-94679 ) , also known as Δ1-15β , 16β-methylenespironolactone , is a steroidal antimineralocorticoid of the spirolactone group related to spironolactone that was never marketed . 
<triplet> spironolactone <subj> antimineralocorticoid <obj> subject has role