7-Methylpyrido(3',2'-4,5)thieno(3,2-d)-1,2,3-triazine-4(3H)-one 76993-12-9 Pyrido(3',2':4,5)thieno(3,2-d)-1,2,3-triazin-4(1H)-one, 7-methyl-, (SP-4-2)- Rhc 2963 Rhc-2963