5 cycloalkenyl 5H chromenoquinoline {HEAD ~ derivatives} as {TAIL ~ selective progesterone receptor modulator compounds} 
as
5 cycloalkenyl 5H chromenoquinoline { HEAD ~ derivatives } as { TAIL ~ selective progesterone receptor modulator compounds }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL