ulipristal

noun

uli·​pris·​tal ˌyü-lə-ˈpris-tᵊl 

variants or ulipristal acetate

: an antiprogestin synthetic steroid C₃₀H₃₇NO₄ that inhibits or delays ovulation and is taken orally especially as emergency contraception

Note: Ulipristal acetate is marketed under the trademark Ella.