Didesmethyl erlotinib hydrochloride

2,2[[4-[(3-ethynylphenyl)amino]-6,7-quinazolinediyl]bis(oxy)]bis-ethanol monohydrochloride ; ethanol,2-[[4-[(3-ethynylphenyl)amino]-6-(2-hydroxyethoxy)-7-quinazolinyl]oxy]-,hydrochloride (1:1) ; ethanol,2,2'-[[4-[(3-ethynylphenyl)amino]-6,7-quinazolinediyl]bis(oxy)]bis-,monohydrochloride (9ci) ; erlotinib didesmethyl metabolite ; didesmethyl erlotinib ; 2,2'-(4-(3-ethynylphenylamino)quinazoline-6,7-diyl)bis(oxy)diethanol hydrochloride ; osi 420 ; didesmethyl erlotinib hydrochloride salt ; 2,2'-((4-((3-ethynylphenyl)amino)quinazoline-6,7-diyl)bis(oxy))bis(ethan-1-ol) hydrochloride