1,3,5-Triazine-2(1H)-thione, tetrahydro-5-methyl-1,3-bis(1-piperidinylmethyl)- 1,3-Bis(methylene-piperidino)-5-methylhexahydro-1,3,5-triazino-2-thione 53818-15-8 Bis-triazine