60872-70-0 B(a)P-N(2)-Gua Guanosine, N-(7,8,9,10-tetrahydro-7,8,9-trihydroxybenzo(a)pyren-10-yl)-, (7R-(7alpha,8beta,9beta,10alpha))- N(2)-(7,8,9,10-Tetrahydro-7,8,9-trihydroxybenzo(a)pyren-10-yl)guanine