Endo, exo, syn, anti

{
  "id": "MLC-T-CHM-003887",
  "term": "Endo, exo, syn, anti",
  "field": "Chemistry",
  "definition": "Descriptors for the orientation of substituents on non-bridgehead atoms of a bicyclic alkane whose three bridges contain x, y and z atoms, with x at least y and y greater than z. A group on the x or y bridge is exo when it points toward the highest-numbered, shortest bridge and endo when it points away from it. A group on the highest-numbered bridge itself is syn when it points toward the lowest-numbered bridge and anti when it points away from it.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "anti",
    "syn",
    "bridge"
  ],
  "references": [
    "PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2207 (https://doi.org/10.1351/pac199668122193)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/endo-exo-syn-anti/"
}