dʒˈɛstɹɪnˌɑːn, ˈɔːlsoʊ nˈoʊn æz sˈɛvəntˌiːn ˈælfəˈɛθɪnˌaɪl ˈeɪtiːnmˈɛθəl nˈaɪntiːnnˈɔːɹdˈɛltə nˈaɪn,ɪlˈɛvəntɛstˈɑːstɚɹˌoʊn, æz wˈɛl æz sˈɛvəntˌiːn ˈælfəˈɛθɪnˌaɪl ˈeɪtiːnmˈɛθaɪlstɹə fˈoːɹ,nˈaɪn,ɪlˈɛvəntɹˈaɪn sˈɛvəntˌiːn bˈeɪɾəˈɑːl θɹˈiːwˈʌn ɔːɹ æz θˈɜːtiːn bˈeɪɾəˈɛθəl ˈeɪtiːn,nˈaɪntiːndˈɪnɚ sˈɛvəntˌiːn ˈælfəpɹˈɛɡnə fˈoːɹ,nˈaɪn,ɪlˈɛvəntɹˈaɪn twˈɛntiˈɪn sˈɛvəntˌiːn bˈeɪɾəˈɑːl θɹˈiːwˌʌn, ɪz ɐ sɪnθˈɛɾɪk ˈɛstɹeɪn stˈɛɹɔɪd ænd ɐ dᵻɹˈɪvətˌɪv ʌv tɛstˈɑːstɚɹˌoʊn.
Gestrinone, also known as 17α-ethynyl-18-methyl-19-nor-δ9,11-testosterone, as well as 17α-ethynyl-18-methylestra-4,9,11-trien-17β-ol-3-one or as 13β-ethyl-18,19-dinor-17α-pregna-4,9,11-trien-20-yn-17β-ol-3-one, is a synthetic estrane steroid and a derivative of testosterone.