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The title compound, C11H15NO4, was synthesized as an intermediate in a synthesis of the morphine skeleton. The two six-membered rings adopt 4H3 half-chair conformations. The five-membered ring is in an envelope (E) conformation. Chains of the molecules hydrogen bonded through the allylic hydroxyl and carbonyl groups extend along the b axis. These chains are cross-linked along the [101] direction by hydrogen bonds between the adjacent secondary OH group and the allylic O atom [allylic O...O(x, 1 + y, z) 2.836 (2) Å, O-H...O 133 (2)°; secondary hydroxyl O...O({1\over 2} + x, {3\over 2} − y, 1 − z) 2.751 (2) Å, O-H...O 174 (2)°].

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks fr1088, global

fcf

Structure factor file (CIF format)
Contains datablock fr1088

CCDC reference: 130310

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