73299-58-8 73412-13-2 74709-65-2 Ristocetin psi-aglycone Ristocetin-psi-aglycone Ristomycin A aglycone, 34-O-(3-amino-2,3,6-trideoxy-alpha-L-ribo-hexopyranosyl)- Ristomycin A psi-aglycone