3263-31-8 6,6'-Diethoxythioindigo Ahcovat Printing Orange R Algol Orange RF Amanthrene Orange R Benzo[b]thiophen-3(2H)-one, 6-ethoxy-2-(6-ethoxy-3-oxobenzo[b]thien-2(3H)-ylidene)- C.I. 73335 C.I. Vat Orange 5 Calcoloid Printing Orange RE Calcoloid Printing Orange RYW Ciba Orange R Ciba Orange RDL Ciba Orange RP Durindone Orange R Durindone Orange RP Durindone Printing Orange R Heliane Orange RF Helindon Orange R Hostavat Orange R Mikethrene Orange R NSC47718 Nihonthrene Fast Orange R Palanthrene Orange R Sandothrene Orange R Solindene Orange RF Sulfanthrene Orange R Sulfanthrene Orange RS Tina Orange R Tyrian Orange A-RF Vat Orange R Vat Orange RF Vat Printing Orange R [.DELTA.2,2'(3H,3'H)-Bibenzo[b]thiophene]-3,3'-dione, 6,6'-diethoxy-