A. Kelling et al., Crystal structure of (3aR,4 ' R,7R,7aS)-tetrahydro-7-hydroxy-2,2,2 ' 2 '-tetramethylspiro[1,3-benzodioxole-5 (4H),4 '-[1,3]dioxolan]-5 '-one, C13H20O6, Z KRIST-NEW, 215(4), 2000, pp. 513-514
C13H20O6, orthorhombic, P2(1)2(1)2(1) (No. 19), a = 6.134(2) Angstrom, b =
13.664(2) Angstrom, c = 16.57(3) Angstrom, V = 1388.8 Angstrom(3), Z = 4, R
-gt(F) = 0.057, wR(ref)(F-2) = 0.167, T = 298 K.