▁h ind w ings ▁are ▁grey - wh it ish . ▁ ▁References ▁ ▁Category : M oth s ▁described ▁in ▁ 1 9 3 1 ▁Category : C ro can thes <0x0A> </s> ▁A pat in ib , ▁also ▁known ▁as ▁Y N 9 6 8 D 1 , ▁is ▁a ▁ty ros ine ▁kin ase ▁in hib itor ▁that ▁select ively ▁in hib its ▁the ▁v asc ular ▁end oth el ial ▁growth ▁factor ▁re ceptor - 2 ▁( V EG FR 2 , ▁also ▁known ▁as ▁K DR ). ▁ ▁It ▁is ▁an ▁or ally ▁bio available , ▁small ▁mole c ule ▁agent ▁which ▁is ▁thought ▁to ▁in hib it ▁ang i ogen esis ▁in ▁cancer ▁cells ; ▁specifically ▁ap atin ib ▁in hib its ▁V EG F - medi ated ▁end oth el ial ▁cell ▁migration ▁and ▁pro l ifer ation ▁thus ▁blocking ▁new ▁blood ▁vessel ▁formation ▁in ▁tum or ▁t issue . ▁ ▁This ▁agent ▁also ▁m ild ly ▁in hib its ▁c - Kit ▁and ▁c - S RC ▁ty ros ine ▁kin ases . ▁ ▁A pat in ib ▁was ▁first ▁synth es ized ▁by ▁Ad ven chen ▁Labor ator ies ▁in ▁California , ▁USA ▁and ▁is ▁being ▁developed ▁by ▁Ji ang su ▁H eng ru i ▁Medicine ▁( Ch ina ), ▁L SK ▁Bio Part ners ▁( US ) ▁and ▁B uk w ang ▁Ph arma ce ut ical ▁Company ▁( K ore a ). ▁It ▁is ▁an ▁investig ational ▁cancer ▁drug ▁currently ▁under going