... Tetrahedron. Volume 44, Issue 16, 1988, Pages 5051–5064. ... Photolysis run in water or in ether in the presence of base generates two additional dienes: methyl 3-methylene-7-methyl-6- octenoate (16) and methyl (3E)-3,7-dimethyl-3,6-octadienoate (17). ...