GP-II

N-FormylGP-I

Antibiotic GP-II

N-formyl-1-hydroxy-13-dihydrodaunomycin

(8S)-8-(1-Hydroxyethyl)-10α-[[2,3,6-trideoxy-3-(formylamino)-α-L-lyxo-hexopyranosyl]oxy]-7,8,9,10-tetrahydro-4,6,8α,11-tetrahydroxy-1-methoxy-5,12-naphthacenedione