18555-60-7 (3R,5R,6S,7S,8R,11R,12S,13R,14S,15S)-12-[(4-O-acetyl-2,6-dideoxy-3-O-methylhexopyranosyl)oxy]-5,7,8,11,13,15-hexamethyl-4,10-dioxo-14-{[3,4,6-trideoxy-3-(dimethylnitroryl)hexopyranosyl]oxy}-1,9-dioxaspiro[2.13]hexadec-6-yl acetate 18507-53-4 SPIRO[FURAN-2(3H),2'-[2H,21H]PORPHINE],1',3',4',- 5',6',7',8',9',10',11',12',13',14',15',16',17',18',19',- 20',23'-EICOSAHYDRO-