Synthesis and growth-inhibitory activities of imidazo[5,1-d]-1,2,3,5-tetrazine-8-carboxamides related to the anti-tumour drug temozolomide, with appended silicon, benzyl and heteromethyl groups at the 3-position. - Cousin D; Hummersone MG; Bradshaw TD; Zhang J; Moody CJ; Foreiter MB; Summers HS; Lewis W; Wheelhouse RT; Stevens MFG (MedChemComm, 2018)