9, 71685-93-3; 10, 38448.31-6; methyl (E)-3-formylbut-2-enoate, 40835-18-5; triethyl phosphite, 122-52-1; 6-ionone, 14901-07-6. ... New Synthesis of 5-Methylbenzo[ alpyrene and 11-Meth:ylbenzo[ alpyrene l,* ... Richard S. Bodine and Guido H. Daub* Department of