6-Oxospiro[3.3]heptane-2-carboxylic acid
1-(3',6'-Bis(ethylamino)-2',7'-dimethyl-3-oxospiro[isoindoline-1,9'-xanthen]-2-yl)-3-phenylthiourea
N-[3',6'-Bis(beta-D-galactopyranosyloxy)-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl]dodecanamide
