28048-39-7 2H-Pyrano(2,3-b)(1,4)benzodioxin-4,4a,7,9(10aH)-tetrol, octahydro-2-methyl-6,8-bis(methylamino)-, (2R-(2alpha,4beta,4abeta,5abeta,6beta,7beta,8beta,9alpha,9aalpha,10abeta))- Dihydrospectinomycin