1(3H)-Isobenzofuranone 1-Phthalanone 2-Hydroxymethylbenzoic acid, gamma-lactone 5-17-10-00007 (Beilstein Handbook Reference) 87-41-2 AI3-05785 BRN 0114632 CCRIS 3598 EINECS 201-744-0 NSC 1469 PHTHALIDE Phthalolactone