Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one,6'-(dibutylamino)-2'-[[4-(1-pyrrolidinylsulfonyl)phenyl]amino], EINECS 286-377-4, Pyrrolidine,1-[[4-[[6'-(dibutylamino)-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-2'-yl]amino]phenyl]sulfonyl]-(9CI), Spiro[isobenzofuran-1(3H),9'-[9H]xanthene],pyrrolidine deriv., 1-((4-((6'-(Dibutylamino)-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthen)-2'-yl)amino)phenyl)sulphonyl)pyrrolidine,