1. 12,15-Dimethyl-8-oxa-tetra-cyclo-[8.8.0.02,7.011,16]octa-deca-1(18),2,4,6,11(16),12,14-heptaen-10-ol
Alan J Lough, Samuel Koh, William Tam IUCrdata. 2020 Mar 10;5(Pt 3):x200315. doi: 10.1107/S2414314620003156. eCollection 2020 Mar.
In the title compound, C19H18O2, the pyran ring is in a half-chair conformation. The fused ring system comprising the benzene and cyclo-hexene rings is essentially planar (r.m.s. deviation = 0.053 Å) and forms a dihedral angle of 27.95 (6)° with the other benzene ring. In the crystal, O-H⋯O hydrogen bonds connect the mol-ecules into chains propagating along [001].
2. 10-Ethynyl-2,3,6,6a,9,10-hexa-hydro-1H-6,9-methano-pyrrolo[2,1-i][2,1]benzo-thia-zol-10-ol 5,5-dioxide
B O Patrick, H Liang, S Canesi, M A Ciufolini Acta Crystallogr Sect E Struct Rep Online. 2009 Oct 3;65(Pt 11):o2621. doi: 10.1107/S1600536809038410.
In the title compound, C(13)H(15)NO(3)S, the sole classical hydrogen-bond donor is involved in an intra-molecular O-H⋯N hydrogen bond. In the crystal structure, pairs of mol-ecules related by inversion centres are linked by pairs of weak inter-molecular C-H⋯O inter-actions; these centrosymmetric pairs are, in turn, linked further by weak inter-molecular C-H⋯O inter-actions, forming two-dimensional sheets oriented parallel to (101).
