hˈɛksɐnˌaɪtɹoʊhˌɛksɑːzˌeɪsoʊˌɜːtsɪtˌeɪn, ˈɔːlsoʊ kˈɔːld ˈeɪtʃnˈɪw ænd sˌiːˈɛl twˈɛnti, ɪz ɐ pˌɑːlɪsˈaɪklɪk nˌaɪtɹˈoʊɐmˌiːn ɛksplˈoʊsɪv wɪððə fˈɔːɹmjʊlə .
Hexanitrohexaazaisowurtzitane, also called HNIW and CL-20, is a polycyclic nitroamine explosive with the formula .